Breathwork Glossary

A paced pattern of inhaling for four counts, holding for seven, and exhaling for eight. It is commonly used for winding down and is often mentioned in sleep-related breathwork. It was popularised by the US physician Andrew Weil and draws on yogic breath control. Because the long exhale and hold slow the overall breathing rate, many people find it calming, although research on this specific pattern is limited. Beginners can start with fewer rounds or shorter counts, keeping the 4:7:8 ratio, if the hold feels strenuous.

A modern, commercially branded group format that typically combines connected breathing with layered music or immersive sound and guided prompts. The name is a marketing label rather than a scientific category, and formats may vary by provider. Sessions are often offered with headphones, either in groups or as recordings at home. The experience mainly comes from connected breathing, music and guided imagery rather than any special technology. The usual screening and contraindications for intensive breathwork apply.

Everyday terms for shifts toward greater alertness or toward settling. Breathing can influence arousal, but responses depend on the pattern, context, and person rather than a simple on-off switch. Fast breathing, breath holds and strong inhales tend to activate, while slow breathing and long exhales tend to calm. Balancing both can be useful, for example ending an energising practice with a few minutes of slow breathing. Noticing your own response matters more than following a general rule.

A hormone and neurotransmitter that prepares the body for action by raising heart rate, alertness and energy availability. Some research on intensive breathing methods has reported adrenaline increases, which may help explain the activated feeling many people describe. Effects depend on the method and the person. A well-known 2014 study found higher adrenaline levels in people trained in the Wim Hof Method during an experimental immune challenge. It is also called epinephrine and is released mainly by the adrenal glands.

Immediate support after a session, such as time to settle, hydration, warmth, orientation, and a clear way to ask for help. It is distinct from longer-term integration and does not replace medical or psychological care. It is good practice not to drive or make major decisions straight after an intensive Session. A light snack, water and some quiet time often help people return to everyday life. Many facilitators also offer a way to get in touch in the following days.

A calm, clear, light or open feeling that some people notice after a session. It is a subjective experience, not a guaranteed result, and not feeling it does not mean a session "did not work". It may last minutes, hours or occasionally a day or two. Giving it space with quiet time, a walk or journaling can help, rather than rushing back into busy activity. Some people feel tired or emotional instead, which is equally normal.

Air hunger is the strong, uncomfortable urge to breathe, triggered mainly by rising carbon dioxide (CO₂) that chemoreceptors in the brainstem and arteries detect. In breath holds and slow-breathing exercises it is a normal protective signal that eases quickly once you breathe again, not a test to push through.

Low oxygen contributes less than most people think, unless a hold becomes long. Breathing exercises that keep a mild, tolerable air hunger are used in functional breathing training to build CO₂ tolerance. Strong air hunger at rest, or together with chest pain, needs medical attention.

The most abundant protein in blood plasma. As blood pH rises, albumin binds more calcium, temporarily reducing the free ionized calcium available to nerves and muscles. It is produced in the liver and also transports hormones, fatty acids and many medicines. This calcium binding is one step in the chain that links over-breathing to tingling and muscle cramping. The effect reverses as soon as breathing and blood pH return to normal.

A temporary shift in perception, emotion, body awareness, or sense of self. Intensive breathing can contribute to such states, but experiences vary widely. Examples include dreaming, deep meditation, trance, hypnosis and states produced by music, fasting or substances. In breathwork, such states are often linked to lower CO₂, rhythm, music and expectation. They can be meaningful, but do not need to happen for a Session to be valuable.

A Buddhist meditation practice described in the Anapanasati Sutta, in which attention rests on the natural breath, for example at the nostrils or the abdomen, without trying to control it. It is a contemplative practice within a wider tradition and differs from techniques that deliberately change the breathing pattern. The sutta describes sixteen steps that move from awareness of long and short breaths to calming the body, feelings and mind. It is a core practice in many Theravada and Zen schools and in modern mindfulness programmes. It is gentle and suitable for most people, though sitting with strong emotions may need support.

A yogic alternate-nostril practice: you breathe in through one nostril, out through the other, and then switch sides, usually slowly and evenly. Many teachers use the name as another word for Nadi Shodhana; others teach Anulom Vilom without breath holds and Nadi Shodhana with them. It is generally a gentle, calming practice. It is widely taught in India, for example in Baba Ramdev's popular yoga programmes. A slow rhythm of about four to six seconds per breath is a comfortable starting point.

The part of the nervous system that regulates functions we do not consciously control, such as heart rate and digestion. Breathing is unusual because it runs automatically but can also be controlled voluntarily, which is why breathing patterns can influence how alert or relaxed we feel. It is usually described as having sympathetic and parasympathetic branches, plus the enteric nervous system in the gut. Slow breathing with a longer exhale tends to shift the balance towards calm, while fast breathing tends to increase activation. Its activity can only be estimated indirectly, for example through heart-rate variability, pupil size or skin conductance. Both branches are active at the same time, so calm and activated describe a shifting balance rather than an on-off switch.

Baroreflex is the body’s fast feedback system for keeping blood pressure stable. Pressure sensors in the carotid arteries and aorta signal the brainstem, which adjusts heart rate and blood-vessel tone within seconds, slowing the heart when pressure rises and speeding it up when pressure falls, for example on standing.

Slow breathing near six breaths per minute interacts with this rhythm and may strengthen reflex activity and heart-rate variability while practising, though long-term effects are still being studied. The brief light-headedness some people notice when getting up after lying down in a Session is partly due to this adjustment taking a moment.

A vigorous yogic practice of forceful, equal inhales and exhales, like a blacksmith's bellows. It strongly activates the nervous system and requires caution with the same contraindications as other intense techniques. Unlike Kapalabhati, where only the exhale is active, both the inhale and exhale are forceful. It is usually practised in short rounds followed by quiet, normal breathing. It is not recommended during pregnancy or with high blood pressure, heart disease, epilepsy, hernia or recent surgery.

A pranayama practice in which you exhale with a steady humming sound, often with the ears gently closed. It is commonly used as a calming practice and is described as increasing nasal nitric oxide. The name comes from the Sanskrit word for bee, after the buzzing sound. The humming lengthens the exhale naturally, which many people find quickly calming. It is gentle enough for most people and can be done in a few minutes before sleep or after a stressful moment.

The main buffer that keeps blood pH stable. It is linked to carbonic acid and CO₂, so when CO₂ falls during over-breathing, the balance shifts and pH rises. The kidneys adjust bicarbonate over hours to days, while breathing changes pH within seconds to minutes. This is why the tingling and cramping from intensive breathing pass quickly once breathing slows: CO₂ builds up again and pH returns to normal. People who breathe too much over long periods may have lower bicarbonate levels as the body adapts.

Biodynamic Breathwork (BBTRS) is a connected-breathing method developed by Giten Tonkov. It combines continuous breathing with music, movement, sound, bodywork and consensual touch, usually in guided group Sessions, and aims to release tension and stress that the method sees as held in the body.

Its full name is Biodynamic Breathwork & Trauma Release System, and it draws on Wilhelm Reich and body psychotherapy and describes six elements it works with: breath, movement, sound, touch, emotion and meditation. Sessions are usually longer and more physically active than gentle breathing practices, so screening and trained facilitators are important. Training is offered internationally through the method's own institute, while independent research on it is still limited.

A body-oriented psychotherapy developed by Alexander Lowen and colleagues from the work of Wilhelm Reich. It uses breath, posture, grounding, movement, and expression to explore links between bodily patterns and emotional experience. Typical exercises include standing stress positions, grounding through the legs and expressive movement with sound. It developed mainly in the United States from the 1950s and is still taught by institutes worldwide, including in Germany.

A measure of how acidic or alkaline blood is. Breathing changes carbon dioxide and can shift pH temporarily; the body normally regulates it within a narrow range. Normal arterial pH is about 7.35 to 7.45. Over-breathing raises it (respiratory alkalosis), while holding or reduced breathing lowers it slightly. Lungs act within minutes, kidneys over hours to days.

A family of psychotherapeutic approaches that includes bodily sensation, posture, movement, and breathing alongside psychological reflection. It influenced several twentieth-century breathwork schools. Examples include Bioenergetic Analysis, Hakomi and Biodynamic Psychology. In Germany it is practised by trained therapists, but it is not one of the procedures covered by statutory health insurance.

A mindfulness practice in which attention moves step by step through the body, noticing sensations without trying to change them. It is part of Mindfulness-Based Stress Reduction (MBSR) and is often used for relaxation or before sleep. In breathwork research it is sometimes used as a comparison practice. A typical body scan takes 10 to 45 minutes and can be done lying down or seated. It is a good way to notice tension before or after breathing practice.

Bohr effect describes how carbon dioxide and acidity influence how readily haemoglobin releases oxygen into the tissues. When CO₂ falls, for example through fast breathing, haemoglobin holds on to oxygen more tightly, so tissues receive it a little less easily even while blood oxygen saturation stays high.

It is named after the Danish physiologist Christian Bohr, who described it in 1904. In breathwork it helps explain why breathing much more than needed does not deliver extra oxygen to the body. This is one reason many teachers favour calm, unhurried breathing for everyday practice.

BOLT (Body Oxygen Level Test) is a simple self-test from functional breathing that estimates CO₂ tolerance: how comfortably your body handles rising carbon dioxide. After a normal exhale, you time how long you can comfortably hold until the first clear urge to breathe. It measures CO₂ sensitivity, not oxygen.

Practitioners use the score to track personal trends; research suggests breath-hold time is only a rough marker, not a medical measurement. A score under about 20 seconds is often taken as a sign of heavier everyday breathing, while 40 seconds is seen as a long-term goal in this approach. The hold should end at the first urge, not be pushed as long as possible. Only do it seated, never in water or while driving.

A paced practice with four equal phases: inhale, hold, exhale, and hold. It is commonly used to steady attention and regulate arousal. A common starting point is four seconds per phase, but the count can be shortened so the holds stay comfortable. It is often associated with military and first-responder training and is easy to practise sitting at a desk. If the holds create strain or anxiety, leave them out and simply breathe in and out evenly.

Observing the breath without necessarily changing it. Attention may rest on airflow, movement, rhythm, or sensation and can form a gentle basis for meditation or breath practice. Many meditation traditions start here because the breath is always available as an anchor. If watching the breath makes it feel tense or controlled, shifting attention to the feet or sounds can help. It is suitable for nearly everyone and can be practised for a few breaths or many minutes.

A short, energising movement-and-breath sequence taught in yoga and stress-management classes, combining stepwise inhales with arm swings and a quick, audible exhale. It is stimulating and mildly dynamic, so people with dizziness, blood-pressure concerns, pregnancy or other health issues should check with a doctor first. A round usually takes only a few seconds and is repeated a handful of times, followed by standing quietly. It is meant to be playful rather than an endurance exercise. If you feel light-headed, stop and breathe normally until it passes.

A deliberate pause after an inhale or exhale. Retentions change carbon dioxide and oxygen levels and should be approached gradually, seated or lying down, and never in water or while driving. In Sanskrit it is called kumbhaka, and holds can follow the inhale (full lungs) or the exhale (empty lungs). Short, comfortable pauses are part of many calming practices such as box breathing. Long holds after fast breathing carry a risk of fainting, which is why they are never practised standing, in water or alone in risky settings.

The combined rhythm, depth, route, and timing of breathing. A pattern includes whether breathing is nasal or oral, fast or slow, shallow or deep, and whether pauses are present. Everyday patterns are shaped by habit, posture, stress and health, and many people are unaware of their own. A relaxed pattern at rest is usually quiet, through the nose and led by the diaphragm. Breathwork deliberately changes one or more of these elements for a set time.

An umbrella term for intentional practices that use breathing patterns to influence attention, arousal, body awareness, or subjective experience. Methods differ greatly in intensity, aims, evidence, and safety requirements. Practices range from slow, calming exercises like coherent breathing to intensive connected or fast breathing that can lead to altered states. Many draw on yoga, meditation and twentieth-century psychotherapy, while others come from sport and respiratory physiotherapy. Choosing a suitable method depends on your goals, health and whether you practise alone or with a trained facilitator.

An informal term for tiredness, mild headache, emotional sensitivity or a spaced-out feeling in the hours or day after an intense session. It is not a clinical diagnosis and usually passes with rest, water, food and quiet time. Severe, unusual or lasting symptoms should be checked by a doctor. Eating something light, drinking water and avoiding alcohol after an intensive Session often help. Planning a quiet evening rather than a busy one is a simple way to prevent it.

A breathing-retraining approach from Soviet-era Ukraine and Russia that emphasizes reduced breathing volume, nasal breathing, and breath holds. It is often discussed in relation to asthma and dysfunctional breathing patterns. Exercises often include gentle breath holds after an exhale, reduced breathing to tolerate slight air hunger and taping or reminders to breathe through the nose. Reviews suggest it may improve asthma symptoms and quality of life for some people, but it does not replace prescribed medication. It is best learned with a trained instructor, especially when health conditions are involved.

A measure of the pressure contributed by dissolved carbon dioxide in blood. When ventilation exceeds the body’s CO₂ production, this value falls and can initiate respiratory alkalosis. It is often written as PaCO₂ for arterial blood and is normally around 35 to 45 mmHg. Even small drops are sensed quickly and influence blood-vessel width, blood pH and the urge to breathe. It explains why the pace and depth of breathing, not just the amount of oxygen, shape how a breathwork session feels.

A weak acid formed when carbon dioxide dissolves in water, including blood. When CO₂ falls, less carbonic acid and fewer hydrogen ions are present, so blood pH rises. The conversion between CO₂ and carbonic acid is sped up by an enzyme called carbonic anhydrase, so it happens within moments. Together with bicarbonate it forms the body's main buffer system for keeping blood pH stable. This is the chemical link between how we breathe and how acidic or alkaline our blood becomes.

Cardiac coherence is a smooth, wave-like heart rhythm in which heart rate, blood pressure and breathing oscillate in step, usually near 0.1 Hz. It is most easily reached by slow, even breathing at about five to six breaths per minute and is associated with calm, focused alertness rather than sleepiness.

In this state the heart speeds up gently on each inhale and slows on each exhale, and the baroreflex amplifies the swing, which shows up as high short-term heart-rate variability. Studies find breathing near this pace with equal inhale and exhale raises variability during practice; claims about lasting emotional or 'heart intelligence' effects are less well established. The Coherent pattern in the free Breathing Pacer uses this rhythm.

Carpopedal spasm is the temporary cramping of the hands, and sometimes the feet, into a claw-like position during intense breathing. It is a form of tetany caused by lower CO₂ and less free calcium. It can look dramatic but is usually not dangerous and eases when the breath slows.

Softening the breath, exhaling longer and gently opening the hands helps. Doctors also know it from hyperventilation during panic attacks and from low blood calcium caused by medical conditions. If cramping appears without fast breathing or does not ease after several minutes of calm breathing, it should be checked by a doctor.

Cerebral blood flow is the amount of blood reaching the brain. It responds strongly to CO₂: over-breathing lowers CO₂ and reduces flow, which explains much of the dizziness felt in intense breathwork. Each drop in CO₂ reduces flow noticeably for a short time. It recovers within minutes once breathing calms. Research suggests that each 1 mmHg fall in arterial CO₂ reduces brain blood flow by roughly 2 to 3 percent. Holding the breath has the opposite effect: rising CO₂ widens the brain's blood vessels and increases flow.

Cerebral vasoconstriction is the narrowing of blood vessels in the brain. A rapid fall in CO₂, for example during fast or deep breathing, can trigger it, temporarily reducing blood flow to the brain and contributing to dizziness or light-headedness. It usually reverses within minutes once breathing calms down.

The brain's vessels are very sensitive to CO₂, which normally helps match blood flow to the brain's needs. People with conditions affecting blood flow to the brain, such as a history of stroke, should seek medical advice before intensive breathwork.

Minimally processed cacao traditionally used in rituals and group settings. It contains theobromine and is sometimes combined with breathwork; people sensitive to stimulants should approach it mindfully. It is usually prepared as a warm drink in larger amounts than everyday cocoa. People taking antidepressants such as MAO inhibitors, or with heart conditions, should check with a doctor first.

Sensors in the brain and blood vessels that help regulate breathing by responding to carbon dioxide, acidity, and oxygen. They contribute to the urge to breathe during a breath hold. Central chemoreceptors in the brainstem mainly track CO₂ and pH, while peripheral ones in the carotid arteries and aorta also respond to low oxygen. Their sensitivity can shift with training and habits. The carotid bodies, small clusters of cells where the carotid arteries divide, are the main peripheral chemoreceptors. Freedivers and others who train breath holds regularly often show a weaker response to CO₂, which is one reason holds feel easier with practice.

A participant's ongoing freedom to choose how deeply to engage, decline touch, change position, pause, or stop. Consent can be changed at any point in a session. A good facilitator reminds participants of this at the start and does not push anyone to breathe harder or longer. Choosing to rest or stop is not a failure. Feeling in control of one's own experience is an important part of safety.

Breathing in a continuous rhythm without intentional pauses between inhale and exhale. The term is used differently in breathwork and in wind-instrument technique. In breathwork it usually describes connected breathing, where the inhale flows straight into the exhale. In music it means a technique for playing a didgeridoo or wind instrument without a break, by pushing air out with the cheeks while inhaling through the nose. The two meanings share a name but work very differently.

The process by which one person’s calm, steady presence can help another person’s nervous system settle. It is commonly described in relationships, groups and facilitated settings. It often works through tone of voice, facial expression, pace and breathing. Infants rely on caregivers for this before they learn to settle themselves. In breathwork, a facilitator's calm presence and slower voice can help a participant feel safe enough to slow down.

CO₂ tolerance describes how comfortably a person can tolerate rising carbon dioxide levels before feeling a strong urge to breathe. Higher tolerance usually goes with calm, light breathing, while lower tolerance is often linked to habitual over-breathing, breathlessness and a stressed breathing pattern. It is usually estimated with breath-hold tests.

A well-known example is the BOLT score from the Buteyko and Oxygen Advantage approaches, which times a relaxed breath hold until the first clear urge to breathe. It is a central idea in functional breathing methods. Results vary with stress, sleep and time of day, so they are best used to track personal trends. It can usually be improved gradually with calm nasal breathing and gentle, light breathing exercises.

A written set of standards a facilitator commits to, typically covering confidentiality, boundaries, consent, avoiding medical or healing claims, non-discrimination, awareness of power dynamics and referral to professionals when needed. In many countries breathwork facilitation is not a regulated profession, so a published code is one way for participants to judge how a facilitator works. Many trainings and professional associations publish their own code, and participants can ask which one a facilitator follows. A code is only useful if it also says how complaints are handled.

Slow, even breathing near a person’s cardiovascular resonance frequency, often around five to six breaths per minute. It may support heart-rate variability and relaxation. A common pattern is an inhale and an exhale of about five to six seconds each, ideally through the nose. Many people practise for five to twenty minutes, and apps or a visual pacer make the even rhythm easier to keep. Because it is slow and gentle, it is one of the most accessible breathing practices for beginners.

Conscious Connected Breathing is an umbrella term for intentional, continuous breathing without pauses between inhale and exhale, usually practised lying down for 30 to 90 minutes. Depending on pace and depth it can lower blood CO₂ and lead to tingling, emotional release or altered states. Schools include Rebirthing and Vivation.

Pace, depth, setting and facilitation differ among schools such as Rebirthing, Holotropic Breathwork and Vivation, and the breath may flow through the mouth or nose. Because effects can be strong, a health screening and an experienced facilitator are recommended, especially for first Sessions.

The sense of safety and structure that a facilitator creates through clear framing, boundaries, pacing and attuned presence, so that strong experiences can be felt without becoming overwhelming. It does not mean controlling or suppressing a person's experience. It includes practical elements such as a clear start and end, agreed signals for help and enough time to settle afterwards. Good containment helps participants trust that they can let go and still be safe.

A health condition or circumstance that makes a practice inadvisable or requires medical approval and adaptation. Contraindications depend on the intensity and mechanics of the technique. Gentle, slow breathing has few contraindications, while intensive methods with fast breathing or long breath holds have more. Common examples include pregnancy, heart disease, epilepsy, glaucoma and some mental-health conditions. A short screening such as a safety questionnaire helps identify when to adapt a practice or check with a doctor first.

A hormone released by the adrenal glands that follows a daily rhythm and rises with stress. Relaxation and slow-breathing practices have been studied for their effects on cortisol, with mixed results. Cortisol is a useful marker in research but not a simple measure of "stress" or wellbeing. Levels are usually highest shortly after waking and lowest around midnight. Short-term rises are normal and helpful, while long-lasting high or flattened patterns are linked to chronic stress and some illnesses.

The part of each breath that fills the airways (nose, throat, windpipe) and does not reach the air sacs where gas exchange happens. It makes up roughly a third of a quiet breath, which is why very shallow, rapid breathing moves less fresh air to the lungs than the breathing rate alone suggests. In an adult it is roughly 150 millilitres per breath. Breathing slowly and a little deeper therefore usually ventilates the lungs more efficiently than panting, even at the same total airflow. A common rule of thumb is about 2 millilitres of anatomical dead space per kilogram of ideal body weight. Snorkels and long breathing tubes add extra dead space, which is one reason breathing through them feels harder.

A set of brain regions that is commonly more active during mind-wandering and self-referential thinking. Changes in its activity are discussed in research on meditation, psychedelics and intense breathing, though findings for breathwork are still limited. Key areas include the medial prefrontal cortex and the posterior cingulate cortex. Reduced activity in this network is often linked to feeling less caught up in thoughts about oneself. Popular claims about breathwork 'switching it off' go beyond what current studies show.

The repeated remembrance of God through names, phrases or prayers in Islamic and especially Sufi practice, sometimes coordinated with breath and movement. It is a religious practice with its own meaning and is not simply a breathing technique. It can be silent or spoken, alone or in a group, and some Sufi orders combine it with rhythmic movement. Its aim is devotion and closeness to God rather than relaxation.

The dome-shaped sheet of muscle below the lungs and the main muscle of breathing. When it contracts, it flattens and moves down, so the chest gets larger and air flows in; when it relaxes, air flows out. It works together with the muscles between the ribs. It is controlled by the phrenic nerve and works automatically, but you can also move it on purpose. A relaxed diaphragm is often felt as a gentle widening of the belly and lower ribs on each inhale.

Diaphragmatic breathing, or belly breathing, is a way of breathing in which the dome-shaped diaphragm contracts and lowers on the inhale, widening the lower ribs and abdomen rather than only the upper chest. Practised slowly, it is linked to a calmer heart rate and a more relaxed nervous system.

The belly only moves because the diaphragm pushes the abdominal organs down. A simple way to feel it is to lie down with one hand on the chest and one on the belly and let the lower hand rise first. It is the basis of many relaxation and functional breathing practices and is generally safe for most people. Physiotherapists also teach adapted versions in rehabilitation, for example for COPD or after abdominal or chest surgery. Small studies suggest that regular slow diaphragmatic breathing can lower self-reported stress, although larger trials are still needed.

The downward and upward movement of the diaphragm that changes pressure in the chest and draws air into or out of the lungs. Abdominal movement can reflect it but is not a perfect measure. At rest the diaphragm does most of the work of breathing. Tension, posture and stress can restrict it, leading to more upper-chest breathing. In quiet breathing the diaphragm moves down by only about one to two centimetres, while in deep breaths it can travel several centimetres further. Its movement also shifts the abdominal organs and changes pressure in the chest and belly, which helps blood flow back to the heart.

A feeling of being detached from one’s body, emotions or surroundings, ranging from mild spacing out to more intense states. If dissociation is frequent or distressing, please seek support from a doctor or licensed mental-health professional before practising intense breathwork. Mild forms, like daydreaming, are common and usually harmless. In breathwork, gently opening the eyes, feeling the body's contact with the floor and slowing the breath can help reconnect. Strong or recurring dissociation can be part of conditions such as post-traumatic stress disorder or dissociative disorders, which only licensed professionals can diagnose. During a Session, telling the facilitator or using an agreed hand signal helps them offer support early.

An umbrella term for breathing patterns that are inefficient or out of proportion to what the body needs, such as habitual chest-dominant breathing, frequent sighing, or over-breathing at rest, and that cause symptoms like breathlessness, dizziness or tingling. It can occur with or without a lung condition, so assessment belongs with a doctor or a specialised physiotherapist. Functional breathing approaches are often discussed in this context, but breathwork is not a treatment for it. Studies suggest it is common, including in people with asthma. Questionnaires such as the Nijmegen Questionnaire are sometimes used as a first screening tool.

A free-form group dance practice without choreography, substances, or talking on the dance floor. It shares some goals with breathwork — presence, expression, release — but works primarily through movement rather than breath. Events often follow a musical wave from slow to energetic and back to stillness. Many cities, including Berlin, have regular ecstatic dance gatherings.

A temporary weakening of the usual sense of being a separate self. It may feel expansive or unsettling and is a subjective experience, not a guaranteed outcome. It is often described in research on psychedelics and meditation, and sometimes after intensive breathwork. Afterwards, people may need time and support to make sense of it. If a sense of unreality or detachment lasts for days, it is worth seeking professional help.

The felt experience of being present in and sensing the body. In breathwork, the term usually refers to noticing sensations and responding to them rather than pursuing a particular state. It also describes the idea that thoughts and emotions are shaped by bodily states, not only by the brain. Simple ways to practise it include feeling the feet on the floor or the breath moving the belly. Many people describe feeling more grounded and present after embodied practice.

The experience of emotions such as tears, laughter, or anger rising and passing during or after a session. Some people feel relief afterward, others feel nothing; neither means they are doing it right or wrong. Strong or lingering distress deserves care and support. In connected breathing, emotions often arise without a clear story or memory attached. Facilitators usually let them run their course and offer grounding if they feel too strong.

A gentle pattern in which exhalation lasts longer than inhalation. It is often used to support settling, provided the breath remains comfortable and does not create air hunger. A simple starting point is inhaling for four seconds and exhaling for six, through the nose or pursed lips. The longer exhale is thought to engage the parasympathetic nervous system, which may help slow the heart rate. It is a practical tool before sleep, presentations or difficult conversations.

A person who prepares, guides, and monitors a breathwork session. Training standards vary, so participants should ask about qualifications, screening, consent, and emergency procedures. In a group Session the facilitator usually explains the practice, sets the pace and music, watches participants and helps if someone needs support. Breathwork facilitation is not a regulated profession in Germany, so trainings range from a weekend to several years. A good facilitator is open about their background and knows when to refer someone to a doctor or therapist.

A concept from psychologist Mihaly Csikszentmihalyi describing absorbed, effortless focus when a challenge matches a person's skill. Rhythmic, attention-focused practices such as breathing exercises may support such states, but flow is not specific to breathwork. It is often described as losing track of time and self-consciousness while feeling in control. A calm, steady breath may make it easier to enter focused work or sport. Flow usually arises from activity rather than from passive relaxation.

Structured breath-hold training from freediving, such as static holds and CO₂ or O₂ tables. Breath holds can cause a blackout without warning, so it is practised on land only, or in water solely with a trained buddy and proper instruction. It prepares for freediving and is not a relaxation tool. A CO₂ table keeps hold times the same while shortening the rest between holds; an O₂ table keeps rest the same while gradually lengthening the holds. Hyperventilating before a hold is strongly discouraged in freediving because it raises the risk of blackout.

A broad approach aimed at efficient everyday breathing, commonly emphasizing nasal, diaphragmatic, quiet, and appropriately paced breathing rather than intense altered-state work. The goal is that breathing matches what the body actually needs at rest, during sleep and in exercise. Typical exercises include nasal breathing, gently slowing the breath and relaxed breathing into the lower ribs. It is often taught by breathing coaches and respiratory physiotherapists, for example for breathlessness, sleep or sport performance. Signs of dysfunctional breathing can include frequent sighing, habitual mouth breathing, breathing high in the chest and feeling short of breath without a medical cause. Questionnaires such as the Nijmegen Questionnaire are sometimes used to screen for symptoms of breathing pattern disorders.

The movement of oxygen into the blood and carbon dioxide out of it, mainly in the lung's air sacs. Ventilation supports gas exchange but is not the same as oxygen delivery to tissues. It happens across the very thin walls of hundreds of millions of alveoli. At rest, blood usually leaves the lungs almost fully saturated with oxygen, so extra breathing adds little oxygen but removes more CO₂. It works by diffusion: each gas moves from where its partial pressure is higher to where it is lower. Lung diseases that thicken the air-sac walls or reduce their surface, such as pulmonary fibrosis or emphysema, can make gas exchange less efficient.

Practices that bring attention back to the body and the present moment, such as feeling the feet on the floor, naming objects in the room, or slowing the breath. Facilitators use grounding at the end of a session and whenever a participant feels overwhelmed. Simple techniques include pressing the feet into the floor, holding something cold or naming five things you can see. A longer, slower exhale is often a quick way to settle. Anyone can use grounding on their own at any moment of a session, without needing permission.

A pre-session check for relevant health history, medication, pregnancy, recent procedures, and current wellbeing. It helps identify when adaptation, medical advice, or not participating is the safer choice. It is often done with a written questionnaire before booking and a short check-in on the day. Typical questions cover heart conditions, epilepsy, pregnancy, glaucoma, recent surgery and mental-health history. Answers are confidential and are used only to keep the Session safe.

Heart-rate variability is the natural variation in time between heartbeats. It reflects how the nervous system regulates the heart and changes with breathing rhythm, posture, activity and stress. Higher resting variability is generally associated with good adaptability, while lower values can accompany stress, poor sleep, illness or ageing.

Slow breathing at around five to six breaths per minute reliably increases short-term variability during the practice itself. Readings from wearables are useful for personal trends but vary between devices and should not be over-interpreted.

Heilkunde is the German legal term for professionally or commercially diagnosing, treating or alleviating illness, suffering or physical complaints. Practising it generally requires a medical licence (Approbation) or a Heilpraktiker permit, with a separate permit route for psychotherapy. Breathwork facilitators who do not hold such a permit therefore do not diagnose, treat or promise relief of illness. This is general information, not legal advice. The legal basis is the Heilpraktikergesetz of 1939, which remains in force with later amendments. The permit is granted by the local public health office (Gesundheitsamt) after a check of knowledge and skills.

A contemplative tradition of inner stillness in Eastern Orthodox Christianity, in which the Jesus Prayer is in some teachings coordinated with the breath. It is a religious practice rooted in its own theology and not an early form of modern breathwork. It developed among monks on Mount Athos and was defended by Gregory Palamas in the fourteenth century. The name comes from the Greek word hesychia, meaning stillness or quiet.

High-ventilation breathwork is an umbrella term for practices that deliberately increase breathing rate, depth, or both enough to lower blood CO₂. Typical effects are tingling, light-headedness, muscle cramping and emotional or altered states. How strong they are depends on intensity, duration, health status and facilitation.

Examples include Holotropic Breathwork, the Wim Hof Method breathing rounds and many connected-breathing formats. Most of the bodily effects come from the drop in CO₂. It is not recommended with conditions such as epilepsy, heart disease, pregnancy or certain mental-health conditions without medical advice.

Being attentively present for others without judging, fixing, or steering their experience. In a breathwork group it includes keeping the room calm and safe, staying available to participants, and respecting each person's pace. It also means tolerating silence, strong emotions or tears without rushing in to make them stop. The term is widely used in coaching, care work and therapy. Holding space has limits: it does not replace professional help when someone is at risk.

Holotropic Breathwork is a facilitated method developed by Stanislav and Christina Grof in the 1970s that combines faster, deeper breathing, evocative music and focused bodywork. Participants usually work in pairs as breather and sitter in an extended group workshop, and a single breathing Session often lasts two to three hours.

The Grofs developed it partly as a drug-free way to access the non-ordinary states they had studied in psychedelic research. The music typically moves from stimulating to heart-centred to meditative, and the Session is often followed by drawing and a group sharing. It is a high-ventilation practice with clear contraindications, so screening by trained facilitators is part of the format. Facilitator certification, for example through Grof Transpersonal Training, usually takes at least two years.

A broad twentieth-century movement focused on personal growth and experiential learning. Centers such as Esalen brought together contemplative practices, bodywork, group therapy, and altered-state exploration, providing a setting for modern breathwork schools to develop. It grew mainly in California in the 1960s and 1970s, influenced by humanistic psychology. Holotropic Breathwork was developed at Esalen by Stanislav and Christina Grof.

A positively charged hydrogen particle written as H⁺. Its concentration helps determine acidity: when CO₂ falls during over-breathing, H⁺ concentration falls and blood pH rises. The pH scale is a logarithmic measure of hydrogen-ion concentration, so small changes in pH reflect relatively large changes in H⁺. The body keeps blood pH tightly between about 7.35 and 7.45. Chemoreceptors respond to H⁺ changes, which is part of how the brain adjusts breathing.

Hyperarousal means being above the window of tolerance: anxious, racing, overwhelmed or hypervigilant. Hypoarousal means dropping below it: numb, flat, foggy, heavy or shut down. Both are nervous-system states rather than failures, and both can appear during intensive breathing. Slowing down, grounding, opening the eyes and pausing are common responses, and persistent symptoms deserve qualified support. Both terms are often used together with the window of tolerance, a concept introduced by psychiatrist Daniel Siegel in 1999. Hyperarousal often shows as a racing heart and restlessness, while hypoarousal can show as heaviness, sleepiness or difficulty speaking.

Hypercapnia is a raised level of carbon dioxide (CO₂) in the blood, the opposite of hypocapnia. During a breath hold CO₂ rises briefly and drives air hunger; it falls again as soon as normal breathing resumes. Mild, short-lived rises are harmless for healthy people. Ongoing hypercapnia is a medical issue, for example in lung disease, with symptoms like headache or drowsiness. Normal arterial CO₂ is about 35 to 45 mmHg, and hypercapnia usually means values above 45 mmHg. Breath-hold practices cause only brief, mild rises in healthy people, but anyone with chronic lung disease should discuss breath holds with a doctor first.

Hyperventilation means breathing more air than the body’s metabolism currently needs, so carbon dioxide (CO₂) is exhaled faster than it is produced. The resulting drop in blood CO₂ can cause light-headedness, tingling, visual changes or muscle tightening, which usually fade within minutes once breathing returns to normal.

In everyday life it can happen during stress, panic or pain, often without being noticed. In some breathwork methods it is used on purpose for a limited time. Practise only seated or lying down, never in water or while driving, and stop if you notice chest pain or feel faint.

Hyperventilation syndrome describes recurring, involuntary over-breathing, often linked with anxiety or panic, that causes symptoms such as tingling, dizziness and chest tightness. Intentional breathwork differs because it is chosen, paced and time-limited. Persistent symptoms should be checked by a doctor. Symptoms can feel frightening and are sometimes mistaken for heart problems, so a medical check is important to rule out other causes. Breathing retraining with a specialised physiotherapist is a common part of care.

Hypocapnia is an abnormally low level of carbon dioxide (CO₂) in the blood, usually caused by breathing faster or deeper than the body needs. In breathwork, this temporary drop shifts blood pH and can cause light-headedness, tingling in the hands or muscle tension that fade when breathing slows.

CO₂ is not just a waste gas: it helps regulate blood pH, blood-vessel width and the release of oxygen to tissues. Lower CO₂ narrows blood vessels in the brain, which is why light-headedness is so common in intense breathing. Symptoms that persist after breathing has calmed down, or chest pain and fainting, need medical attention.

Breathing too little for the body's metabolic needs, which lets CO₂ rise. It is the opposite of hyperventilation. It can result from medical conditions or medication and is different from a short, voluntary breath hold. Examples include sleep apnoea, obesity hypoventilation and the effects of opioids or sedatives. Slow breathing practices for relaxation usually reduce breathing only slightly and do not cause clinical hypoventilation in healthy people.

A state of reduced oxygen availability in tissues. Some breathwork methods deliberately create brief, controlled low-oxygen states through breath holds; this is different from uncontrolled oxygen deprivation and requires caution. Breath holds after over-breathing can lower oxygen saturation markedly while the urge to breathe stays weak, which is why they belong only on dry land, seated or lying down. Mild drops recover within seconds once breathing resumes. People with heart, lung or seizure conditions should avoid long breath holds unless a doctor agrees.

A voluntary agreement made after receiving understandable information about a session's format, likely effects, meaningful risks, alternatives, privacy, touch, and the right to pause or stop. It should be given before the Session starts, often in writing together with a health questionnaire. Consent is not a one-off signature: participants can withdraw it at any time. Clear information also helps people decide whether a format suits them at all.

The relative duration of inhalation and exhalation. Practices may use equal phases or a longer exhale, but comfort and unforced breathing matter more than reaching an exact count. A common example is a 1:2 ratio, such as inhaling for four counts and exhaling for eight. A longer exhale is often linked with calming, while a longer inhale can feel more energising. If a ratio causes air hunger or tension, shorten the counts or return to natural breathing.

The process of reflecting on an experience and translating useful insights into grounded choices, relationships, or routines after a session. It can include talking with a facilitator, journaling, rest, time in nature or small changes in daily habits. Integration often continues for days or weeks after a strong experience. Not every insight needs to be acted on, and grounding in everyday life is part of the process.

The muscles between the ribs that help expand and narrow the rib cage during breathing, working together with the diaphragm. They become more active during deep or fast breathing and can feel tired or sore after intense sessions. The external intercostals mainly help lift the ribs on the inhale, while the internal intercostals support forced exhalation, for example when coughing. Gentle side-body stretches and relaxed rib breathing can ease tension in this area. Each space between two ribs holds three layers: the external, internal and innermost intercostal muscles. They are supplied by the intercostal nerves, which run along the lower edge of each rib together with blood vessels.

Repeated short exposures to low oxygen alternated with normal air, studied in altitude physiology, sports and clinical research. Results vary by protocol and population. It is usually done with equipment and under supervision, and it is different from breath holds as practised in breathwork. Typical protocols use masks or altitude tents that deliver air with less oxygen for a few minutes at a time. It is not suitable for people with heart or lung disease without medical supervision.

The perception of signals from inside the body — heartbeat, breath, tension, gut feelings. Breathwork often trains this inner sensing, which is linked to emotional awareness and self-regulation. It is now seen as its own sense alongside sight or touch and is studied in psychology and neuroscience. Good interoceptive awareness is associated with emotion regulation, while some people find inner signals confusing or overwhelming at first. Slow, attentive breathing and body scans are gentle ways to practise it.

The free, biologically active form of calcium in blood. During alkalosis, more calcium binds to albumin, so ionized calcium temporarily falls and nerves and muscles may become more excitable. Total calcium in a blood test may look normal even when the free fraction has dropped for a short time. This temporary dip is a key reason for tingling and cramping during fast breathing. It normalises as CO₂ and pH return to their usual range after the breathing phase.

Writing down impressions, sensations, images or questions after a session, often without editing or judging. It is a common integration tool that helps some people sort what they noticed and decide what, if anything, to take into daily life. It is optional and works differently for different people. Helpful prompts include: What did I notice in my body? What surprised me? What do I want to remember? Drawing, single words or voice memos work just as well as full sentences.

A traditional yogic cleansing practice of rapid, forceful exhales with passive inhales. It is stimulating and not suitable for everyone, especially during pregnancy or with cardiovascular conditions. It is often called “breath of fire”, although some teachers distinguish the two as different techniques. The name means skull-shining in Sanskrit. It is usually practised in short rounds of about 20 to 60 exhales, followed by a few quiet, normal breaths, and should be stopped if you feel dizzy.

A Soviet physician (1923-2003) who developed the breathing-retraining approach now known as the Buteyko Method, which emphasises reduced breathing volume, nasal breathing and breath holds. His physiological explanations are debated, although some studies have looked at its use in asthma. He believed that chronic over-breathing contributes to many illnesses, a view that is not supported by current evidence. His method spread to Australia and Western Europe from the 1990s.

A yogic practice in which the right nostril is gently closed and you breathe slowly through the left one for a few cycles. It is used to wind down; evidence for the left side specifically is limited, and much of the calming effect is likely due to the slow pace itself. In yoga it is called Chandra Bhedana, the moon-piercing breath, and is linked with cooling and calming. A few minutes before sleep is a common way to try it. If the nose is blocked, simply breathe slowly through both nostrils instead.

The American who, by his own account, began developing Rebirthing in the late 1960s and early 1970s. His work shaped many later connected-breathing approaches, which have since developed in different directions. He taught Rebirthing internationally until his death in 2019. Some of his spiritual claims are not supported by science.

Light-headedness is a dizzy or floaty feeling during fast or deep breathing, mainly because low CO₂ narrows brain blood vessels. Slowing the breath usually resolves it; sit or lie down, and stop if it becomes intense or you feel faint. It is one of the most common sensations in connected and fast breathing and often comes with tingling. It can also occur when standing up too quickly after a Session, so it is best to get up slowly. If it comes with chest pain, confusion or fainting, seek medical help.

A yoga practice of inhaling through the nose and exhaling forcefully through a wide-open mouth with the tongue extended and an audible "ha". It is usually done for a few rounds to release tension in the face, jaw and chest. Stop if it makes you light-headed. In Sanskrit it is called Simhasana, lion pose, and is often taught in children's yoga because it is playful. Gently stretching the eyes upwards is sometimes added.

A small brainstem nucleus that produces noradrenaline and is involved in arousal, attention and alertness. Emerging research suggests that breathing rhythm may be linked to its activity and to attention, but findings are early and often come from small or animal studies. It is a major source of the brain's noradrenaline. Claims that a specific breathing technique trains it are not established. Its name is Latin for blue spot, after the bluish colour of its cells. It is one of the brain areas affected early in Alzheimer's and Parkinson's disease, which makes it an active research topic.

The rhythmic repetition of sounds, words, or phrases, which naturally lengthens the exhale and involves the voice and breath together. Chanting and singing share physiological effects with slow breathing practices. Well-known examples include chanting Om in yoga or repeating prayers in many religions. A small study found that chanting the rosary or yoga mantras slowed breathing to about six breaths per minute.

Pregnancy, cardiovascular or neurological conditions, seizure history, glaucoma or retinal concerns, recent surgery, and some mental-health conditions can require avoiding or adapting intensive breathwork. Individual guidance belongs with a qualified clinician. Gentle, slow breathing is often still possible when intensive methods are not. A screening such as a safety check helps identify what to discuss with a doctor. These groups are listed because intensive breathing can change blood pressure, CO₂ levels, blood flow to the brain and emotional arousal. Medication, for example for blood pressure, epilepsy or mental health, can also be relevant and should be mentioned during screening.

A two-minute relaxation sequence usually traced to coach Bud Winter: relaxing the face, shoulders and arms, releasing the chest on an exhale, relaxing the legs, then clearing the mind. The breath is one part of a whole-body routine; the often-quoted success rate comes from a coaching book, not a clinical trial. It became widely known through the 1981 book Relax and Win, which described training US Navy pilots. Many people find it easier with a few minutes of slow, longer exhales at the start. It can be practised lying in bed and is safe for most people.

The total volume of air breathed in or out per minute, broadly calculated from respiratory rate and tidal volume. Increasing it beyond metabolic need can lower carbon dioxide. At rest it is usually around five to eight litres per minute and rises sharply during exercise. Fast or deep breathwork can raise it far above what the body needs, which is what causes tingling and light-headedness. Calming practices tend to keep it close to or slightly below normal.

Mouth breathing means breathing mainly through the mouth instead of the nose. It is normal during hard exercise, while speaking or with a blocked nose, but as a habit at rest or during sleep it is linked to drier airways, snoring, poorer sleep quality and faster, upper-chest breathing.

Air breathed through the mouth bypasses the nose’s filtering, warming and humidifying, as well as the gentle resistance that slows the breath. Functional breath training therefore usually retrains toward nasal breathing. If mouth breathing is persistent, especially in children, it is worth having the nose and airways checked by a doctor.

A research term for experiences marked by a sense of unity, sacredness, timelessness and deep meaning. They are studied in meditation and psychedelic research and can occasionally occur in breathwork, but they are neither the goal nor a measure of success. How a person interprets such an experience is personal. Researchers often measure them with the Mystical Experience Questionnaire, which was developed from the work of Walter Pahnke and W. T. Stace. Integration and conversation can help place such experiences in everyday life.

A traditional pranayama practice of breathing alternately through each nostril, usually using the fingers to close one side. It is commonly used to settle the mind and balance arousal. A typical round is to close the right nostril and inhale through the left, then close the left and exhale through the right, and continue alternating. It is practised slowly and without force, often for five to ten minutes. Studies suggest slow alternate-nostril breathing may lower heart rate and blood pressure slightly, probably mainly because of the slow pace.

Breathing through the nose, which filters, warms, and humidifies air. It also supports nitric-oxide availability and is commonly preferred during rest and low-intensity activity. The nose also adds gentle resistance, which tends to slow the breath and encourage use of the diaphragm. Many breath trainers recommend nasal breathing during sleep and light exercise and switching to the mouth only when the body needs more air. If the nose is often blocked, a doctor can check for causes such as allergies or a deviated septum.

How readily nerve cells respond to stimulation. A rapid rise in pH and the associated fall in ionized calcium can increase excitability, contributing to tingling, muscle stiffness, or tetany. Nerves in the hands, feet and around the mouth often react first, which is why tingling tends to start there. The effect is temporary and reverses when breathing slows. Tingling that appears without over-breathing, or does not fade, should be checked by a doctor.

A popular, non-technical phrase for practices intended to bring one's level of physiological arousal into a calmer or more balanced state. For example, a prolonged exhale is associated with increased vagus nerve activity and higher heart rate variability; however, the phrase is broader than any single measurable mechanism, and effectiveness can vary from person to person. Simple examples include slow breathing, a longer exhale, humming, gentle movement or feeling the feet on the floor. What helps differs between people and situations, and the phrase is not a medical term or a treatment for anxiety disorders. In psychology, the related term self-regulation describes the broader ability to manage attention, emotions and behaviour. Co-regulation, feeling calmer through the steady presence of another person, is a closely related idea often used in group and one-to-one settings.

A term by Stephen Porges for the nervous system's automatic, below-awareness detection of cues of safety or threat. It is part of polyvagal theory, whose physiological assumptions are debated in the scientific literature, so it is best understood as a useful metaphor rather than a measured mechanism. Examples of such cues are a calm voice, a friendly face, a quiet room or, on the other side, sudden noise or feeling trapped. In facilitation the idea is often used to explain why a safe setting, clear information and choice can make it easier to relax. Porges introduced the term in 2004. Because neuroception cannot be measured directly, research instead looks at related signals such as heart rate, facial expression or how safe people say they feel.

A natural shaking or trembling of the large muscles that can follow stress or intense effort, and that is described as a way for the body to release tension. Some body-based methods try to evoke it deliberately. Scientific evidence for specific benefits is still limited, and it should not be forced. The best-known method is TRE (Tension and Trauma Releasing Exercises), developed by David Berceli. If trembling feels uncomfortable, it can usually be stopped by changing position or stretching the legs.

A gas produced in the nasal passages that widens blood vessels and improves airflow and oxygen uptake. Nasal breathing delivers it to the lungs — one reason nasal breathing is emphasized in functional breath training. Most of it is produced in the paranasal sinuses, and humming has been shown to increase the amount released into the nose considerably. Breathing through the mouth largely bypasses this source. The overall health effects of nasal nitric oxide in everyday breathing are still being researched.

A research term for an experience of unity, timelessness, positive mood, and softened boundaries between self and surroundings. It can occur in altered states but is not specific to breathwork. The term comes from the Swiss researcher Adolf Dittrich's questionnaire on altered states and is still used in psychedelic research. Its name echoes the oceanic feeling described by Romain Rolland and Sigmund Freud. Such experiences are often described as positive, but they vary greatly from person to person.

A contemporary breath-training system by Patrick McKeown, aimed mainly at athletes, using nasal breathing, breath holds, and CO₂-tolerance training to improve breathing efficiency. It builds on the Buteyko Method and uses the BOLT score to track progress. Exercises include nasal breathing during exercise, breath holds while walking and simulated altitude training. Breath-hold training should be practised gradually and never in or near water. McKeown described the approach in his 2015 book The Oxygen Advantage. Research on the programme itself is limited, although studies on nasal breathing and breath-hold training in athletes cover parts of it.

The percentage of haemoglobin carrying oxygen, often estimated by a pulse oximeter as SpO₂. A normal reading does not rule out symptoms caused by low carbon dioxide or other conditions. In healthy adults at rest it is typically around 95 to 100 percent. It can drop during long breath holds and usually recovers quickly. Readings can be affected by cold hands, movement or nail polish.

A sudden surge of intense fear that may include rapid breathing, chest sensations, dizziness, or a sense of losing control. Intense breathwork can resemble or trigger these sensations in some people. Lengthening the exhale, opening the eyes and orienting to the room can help it pass. People with panic disorder may prefer gentle, slow practices and should talk to a clinician before intensive methods. A panic attack usually peaks within about ten minutes and, while very unpleasant, is not dangerous in itself. Chest pain or breathlessness that is new or unclear should still be checked by a doctor, because it can have other causes.

A breathing-retraining approach developed at Papworth Hospital in the UK, built around relaxed, nasal and diaphragmatic breathing, often taught by physiotherapists. It has been studied for asthma-related symptoms and breathing-pattern problems. It is a clinical retraining method, not an intense breathwork practice. It was developed in the 1960s and combines breathing exercises with relaxation and education about how stress affects breathing. A 2007 randomised trial found it improved respiratory symptoms and anxiety in people with asthma.

A breathing pattern in which chest and belly move opposite to the expected direction, for example the belly pulling in as air comes in. A deliberate version is sometimes taught in martial arts and some yoga traditions. Unintended paradoxical breathing that is persistent or comes with breathlessness should be assessed by a doctor. It can occur during stress, after injury to the chest or with weakness of the diaphragm. Learning relaxed diaphragmatic breathing often helps when there is no medical cause.

Sensations such as tingling, pins and needles, or numbness, often in the hands, feet, or around the mouth. During intensive breathing they are commonly linked to lower carbon dioxide and changes in blood chemistry and usually ease when breathing slows. Chest pain, severe cramping, or symptoms that do not settle call for medical attention. The drop in CO₂ makes the blood more alkaline, which lowers the amount of free calcium and makes nerves fire more easily. The sensations are usually harmless and temporary in healthy people and often fade within minutes once breathing returns to normal.

A term from psychologist Abraham Maslow for rare moments of intense joy, wonder or wholeness, often described as spontaneous and self-validating. They can arise in many settings, including music, nature and breath practice, and cannot be reliably produced on demand. Maslow saw such moments as signs of healthy psychological development, not as illness. In breathwork they are best seen as a possible side effect rather than a goal. What often matters more is how the experience is reflected on and integrated afterwards.

A concept from Somatic Experiencing (Peter Levine) describing a gentle movement of attention back and forth between a difficult sensation or emotion and something that feels neutral or supportive. The aim is to approach intensity in small amounts and return to steadiness. It is used alongside titration and resourcing, and evidence from controlled studies is still limited. In practice a facilitator might invite you to notice a tense area for a moment, then shift attention to your hands or the floor. The term comes from the image of a pendulum swinging gently back and forth.

A breathing pattern of two inhales followed by a longer exhale. Spontaneous sighs help reopen collapsed air sacs; deliberate repetitions are also used as a short calming practice. In practice you take a full inhale through the nose, add a short second sip of air, then let a long, slow exhale follow through the mouth. One to three repetitions are often enough to feel calmer, and a small 2023 study found five minutes a day of cyclic sighing improved mood. It is quick, discreet and generally safe, but should not be repeated so fast that it causes dizziness.

Expectations, setting and trust influence what people notice and report, in breathwork as in most other practices and treatments. This does not mean that experiences are "fake": a real felt effect can be partly shaped by context. It is one reason why careful research on breathwork needs good control conditions. In breathwork, good placebo controls are hard to design because participants usually know how they are breathing. Being aware of expectations helps people stay open to whatever arises.

A model by Stephen Porges that describes how different branches of the autonomic nervous system relate to safety, connection and defence. It is popular in somatic and breathwork circles, but several of its physiological assumptions are debated in the scientific literature. It distinguishes a ventral vagal state linked to social connection, a sympathetic state of mobilisation and a dorsal vagal state of shutdown. Many practitioners find it a helpful language for describing experiences, even where the underlying anatomy is contested. Porges first presented the theory in 1994 and has expanded it in several books since. Critics, among them the psychophysiologist Paul Grossman, argue that key claims about the evolution and function of the vagus nerve are not supported by current evidence.

A Sanskrit word meaning breath or life force, central in yoga and Ayurveda, where pranayama means working with or regulating prana. It is a traditional concept rather than something science has measured, and it is best presented in its cultural context. In yoga texts prana is said to flow through channels called nadis, a concept behind practices such as alternate-nostril breathing. In modern breathwork the word is often used loosely for vitality or energy.

The diverse breath-regulation practices within yoga traditions. Pranayama includes many distinct techniques and should not be treated as a single breathing pattern. The Sanskrit word is often translated as extension or regulation of the breath or life force (prana). Techniques range from gentle alternate-nostril breathing (Nadi Shodhana) to vigorous practices such as Kapalabhati and Bhastrika. Traditionally they are learned step by step from a teacher, and the more forceful techniques have the same cautions as other intensive breathwork.

A cluster of neurons in the brainstem that helps generate the basic rhythm of breathing. Animal studies have linked neurons in or near this network to arousal and calm. How far this applies to humans and to deliberate breathing practices is still unclear. It was first described in rats in 1991 and named after the nearby Bötzinger complex. It works automatically, which is why breathing continues during sleep without conscious effort.

A contemporary branded breathwork format that combines active or connected breathing, breath retentions, electronic music, and facilitation to support altered-state experiences without psychedelic substances. The name refers to the intensity of the experience, not to any substance being used. Its altered states come mainly from fast breathing that lowers CO₂, combined with music, darkness and expectation. It is therefore not suitable for everyone, and the usual contraindications for high-ventilation breathwork apply. Because it is a branded format, details such as session length, music and the use of breath holds depend on the provider. There is no dedicated scientific research on this format, so its likely effects are inferred from studies on high-ventilation breathing in general.

The process of making sense of and applying insights from intense experiences — psychedelic or breathwork-induced — in everyday life. Integration support helps translate an experience into lasting change. Support may come from trained coaches, therapists or peer groups and usually focuses on reflection rather than on the substance itself. Integration coaching does not encourage or provide substance use. Where an experience leads to lasting distress, psychotherapeutic or medical support is the right next step.

Breathing in through the nose and out slowly through gently pursed lips, as if blowing out a candle. It is used in clinical settings, for example with chronic lung disease, to slow the breath and ease shortness of breath. It is simple, gentle and a good example of a technique with a clear practical purpose. A common guide is to breathe in for about two counts and out for four. The gentle back-pressure helps keep small airways open longer, which is why lung-health organisations recommend it for COPD.

A diverse family of Chinese practices combining posture or movement, breathing, and focused attention. Qigong comes from its own cultural and medical traditions and is not simply an early form of modern breathwork. Practice often includes slow standing or flowing movements, relaxed abdominal breathing and attention to the lower belly (dantian). Tai chi is closely related and sometimes counted as a form of qigong. Research suggests gentle qigong can support balance, relaxation and wellbeing, especially in older adults, though study quality varies.

A modern connected-breathing practice associated with Jeru Kabbal that combines rhythmic breathing, music, and guided attention. Sessions usually follow a recorded guided audio journey in which participants breathe continuously while music and voice set the pace. Like other connected-breathing formats, it can cause tingling, strong emotions and altered states. The same health screening and contraindications apply as for other intensive breathwork. The practice is usually done lying down, and the recordings typically run for about an hour. There is little independent research on this specific method, so its effects are known mainly from participants' reports.

An intrusive return of memories, sensations, or emotions linked to a distressing event. If this occurs during breathwork, slowing or stopping, orienting to the present, and seeking qualified support may be appropriate. It is a core feature of post-traumatic stress and can feel as though the past is happening now. Facilitators should not push people to relive memories. Common forms include flashbacks, nightmares and strong body reactions to reminders of the event. Simple ways to return to the present are naming a few things you can see or hear and feeling your feet on the ground.

A reactivation of overwhelming reactions tied to past trauma, triggered by an experience, setting or interaction that resembles the original threat. In breathwork it can show up as flooding, panic, dissociation or shutting down. Trauma-informed practice lowers the risk through choice, pacing and clear consent, but cannot remove it, and ongoing trauma symptoms belong with a licensed therapist. Warning signs include feeling unreal, frozen, panicked or unable to come back to the present after a Session. Gentle grounding, opening the eyes and slowing the breath can help in the moment, and lasting symptoms should be shared with a therapist.

Rebirthing Breathwork is a form of conscious connected breathing developed by Leonard Orr. Guided by a trained facilitator, you breathe in a relaxed, continuous rhythm without pauses between inhale and exhale, usually for 60–90 minutes, while staying aware of bodily sensations and emotions, followed by rest and integration.

By his own account, Orr began developing the method in the late 1960s and early 1970s. Many people describe tingling, waves of emotion, deep relaxation or fresh insight. Because it is a high-ventilation practice, it has real contraindications — read the safety guidance before your first Session.

Symptoms that call for stopping and prompt medical attention, such as chest pain, fainting, severe or unusual shortness of breath, new neurological symptoms, or symptoms that do not settle. This list is not exhaustive. Expected sensations such as tingling usually fade within minutes of normal breathing. When in doubt, stop and call emergency services (112 in Germany). Other warning signs include a sudden severe headache, confusion, weakness or numbness on one side of the body, slurred speech and seizures. A responsible facilitator knows basic first aid and how to reach emergency services from the venue.

Directing someone to an appropriately qualified professional when their needs fall outside a facilitator's training or role. Depending on the situation, this may mean medical, psychotherapeutic, or emergency support. Facilitators should know local options such as GPs, psychotherapists and crisis services. Referring someone is a sign of responsible practice, not of failure. In an emergency, the right step is always to call emergency services, in Germany 112.

Fuller breathing combined with bodywork, used by psychoanalyst Wilhelm Reich to address chronic muscular tension, which he linked to held-back emotion. It is a historical root of somatic breathwork and Bioenergetic Analysis; Reich's theories remain controversial, and these approaches today live mainly within body psychotherapy. Reich worked in Vienna, Berlin and later the United States, where his later theories were widely rejected. His ideas strongly influenced later body psychotherapies in Germany and elsewhere.

Breathing against a deliberate resistance, such as through a straw, narrowed lips or a hand-held trainer, to slow the breath or train the breathing muscles. Inspiratory muscle training has been studied in athletes and in some clinical groups with mixed results depending on the context. It should be gentle and never forced, and medical advice is sensible with heart or lung conditions. Devices usually let you set the resistance and are used for a few minutes once or twice a day. Gentle resistance can also slow breathing for relaxation, similar to ujjayi or pursed-lip breathing.

An individual's breathing rate at which heart rate and blood-pressure rhythms tend to coordinate most strongly, often near five to six breaths per minute in adults but not identical for everyone. It can be estimated with HRV biofeedback by testing slightly different paces. Breathing at this rate tends to produce the largest heart-rate oscillations, and many people find it calming. Coherent breathing apps use similar paces. The concept was developed in HRV biofeedback research by Evgeny Vaschillo and Paul Lehrer. Studies have linked slightly slower resonance rates to greater body height and to male sex, but the differences are small and an even, comfortable pace matters more than an exact number.

Deliberately turning attention to something that feels safe or supportive, such as a sensation of ease, the contact of the floor, a calm place or a trusted person, to help the nervous system settle. In sessions it can be used before, during or after intense moments. Resources are personal: what steadies one person may not steady another. Simple resources include slow breathing, opening the eyes, touching an object or recalling a good memory. Building them before intensive work can make strong moments easier to manage.

A fall in blood pH caused by CO₂ building up faster than it is breathed out, the opposite of respiratory alkalosis. It is a clinical condition, usually linked to hypoventilation. A short breath hold raises CO₂ only briefly, and the body corrects it quickly when normal breathing resumes. Causes include severe lung disease, sedating medication and conditions that weaken the breathing muscles. Symptoms such as confusion, drowsiness or headache need urgent medical attention.

Respiratory alkalosis is a rise in blood pH above the normal range (above 7.45), caused by breathing out CO₂ faster than the body produces it. In fast connected breathing, this temporary shift lowers the free calcium in the blood and is the main reason behind tingling, cramping and light-headedness.

In intensive breathwork it is generally short-lived and reverses as breathing normalizes. The kidneys can compensate over hours to days, but in a breathwork Session breathing itself restores the balance within minutes. Clinically, ongoing respiratory alkalosis can also point to other conditions and is assessed by a doctor.

Respiratory drive is the automatic signal from the brainstem that sets the rhythm and depth of breathing. In healthy people it responds mainly to rising carbon dioxide (CO₂) and falling blood pH, sensed by chemoreceptors, rather than to low oxygen, which becomes a strong trigger only when oxygen falls markedly.

The drive is adjusted by emotions, speech, exercise and conscious control. After over-breathing it is temporarily weaker, which is why breath holds feel easy and can be risky in water. Some medicines, such as opioids and strong sedatives, can dampen it, which is one reason they are prescribed with care. Sensitivity to CO₂ differs between people, and those with a very sensitive drive may feel breathless quickly during breath holds.

Respiratory rate is the number of breaths taken per minute. A healthy adult at rest typically breathes about 12 to 20 times per minute, and the rate changes with activity, emotion, health and deliberate practice. Slow-breathing exercises often aim for around five to six breaths per minute.

Respiratory rate is only one part of a breathing pattern: depth (tidal volume) and rhythm matter too. Intensive breathwork can be much faster than resting breathing. A persistently high resting rate can be a sign of illness and is worth checking with a doctor.

The normal tendency for heart rate to rise slightly during inhalation and fall during exhalation. It contributes to breathing-related patterns in heart-rate variability. Despite the name it is healthy and usually stronger in young, fit people. It becomes more pronounced with slow, deep breathing, which is the basis of HRV biofeedback. It is mainly carried by the vagus nerve, whose slowing effect on the heart briefly eases during each inhale. It tends to decrease with age and is often used in research as an indirect marker of vagal activity, although this use has limits.

The limits of what a facilitator is trained and legally permitted to do. Breathwork facilitation is not psychotherapy, medical treatment or naturopathic practice (Heilkunde): facilitators do not diagnose, treat or promise to relieve illness, and do not advise on medication. In Germany, exercising Heilkunde requires a medical licence, a psychotherapy licence or a Heilpraktiker permit. A responsible facilitator asks about relevant health conditions in advance and refers people to a doctor or licensed therapist when something falls outside this scope. It also covers what happens after a Session, for example not interpreting experiences as diagnoses or emerging memories as proven facts. In Germany, advertising that promises to cure or relieve illness is additionally restricted by the Heilmittelwerbegesetz (HWG).

The ability to notice and respond to one's changing level of arousal, emotion, and bodily need. In breathwork this may include adjusting pace, resting, opening the eyes, or stopping. It is a skill that develops over time and can be practised with simple tools such as slow breathing or grounding through the senses. Strong self-regulation does not mean never feeling overwhelmed, but being able to find your way back. Breathwork can support it, especially gentle, slower practices.

A flexible focus or quality a person brings to a session. It can guide attention without becoming a demand for a particular result or experience. Examples are curiosity, rest, clarity or kindness towards oneself. An intention is often set quietly at the start and revisited afterwards during reflection or journaling. It is fine if a Session goes in a different direction than expected.

The internal mindset ('set') and external environment ('setting') that influence how an experience unfolds. Preparation, trust, privacy, music, and facilitator conduct all contribute. The phrase comes from psychedelic research of the 1960s and is now widely used for breathwork as well. Set includes intentions, expectations, mood and current life situation; setting includes the room, the group, safety agreements and how support is offered. Taking time for both before a session can make strong experiences feel safer and easier to integrate.

A sudden loss of consciousness underwater caused by low oxygen after a breath hold, often following deliberate over-breathing. Over-breathing lowers CO₂ and can weaken the urge to breathe, so the usual warning signal may be missing and a person can black out without feeling distress. It is a main reason why breath holds and intensive breathing are never practised in water, not even in a shallow pool or when swimming alone. It can happen to strong, experienced swimmers and often occurs silently, without splashing or calling for help. Freedivers train with a buddy who watches every hold for exactly this reason.

A term for breathwork sessions framed with shamanic or ceremonial elements such as drumming, music and intention-setting. Formats differ widely between facilitators, and some use the name for their own trained method. Some Sessions draw loosely on indigenous traditions, which raises questions of cultural respect and accurate representation. The breathing itself is often connected or accelerated, so the same screening and safety guidelines apply as for other intensive breathwork. Asking a facilitator about training and format helps you understand what to expect.

A group conversation after a session in which people may share their experience, always voluntarily. Common ground rules are speaking from one's own experience, no advice-giving, no interpreting others, and keeping what is shared confidential. Staying silent is always an option. Many people find it helpful to hear that others had similar or very different experiences. The facilitator usually guides the circle and keeps time so that everyone who wishes can speak.

Two traditional pranayama practices in which the inhale is drawn in through a curled tongue (Sitali) or through slightly parted teeth (Sitkari) and the exhale leaves through the nose. They are traditionally used to feel cooler and calmer. Evidence is limited, and traditional sources advise caution with respiratory conditions or when feeling cold. Not everyone can curl the tongue, which is why Sitkari is offered as an alternative. A few slow rounds are usually enough.

In Holotropic Breathwork, participants work in pairs: one breathes while the other, the sitter, stays nearby as a calm, non-directing presence. A sitter offers water, tissues or a steady hand if wanted and calls the facilitator when needed, but does not steer the experience or interpret it. Partners usually swap roles in a second Session, so each person experiences both. Being a sitter is often described as a valuable practice in attentive presence.

A contemporary branded system combining rhythmic music-led breathing, guided breath retentions, meditation, and group facilitation. Its format differs from older connected-breathing schools such as Rebirthing and Vivation. It was founded by Niraj Naik and draws on pranayama and modern breathing research. Many Sessions combine faster rhythmic breathing with breath holds, which can lower CO₂ and temporarily reduce oxygen. The usual cautions apply: practise seated or lying down, never in water, and check contraindications first.

An umbrella term for breathwork that directs attention to bodily sensation, tension, and movement rather than to a particular breathing technique. Usage is not standardised: some use it for gentle, sensation-focused practice, others for intensive connected breathing with emotional release. Because the term means different things, it is worth asking a facilitator how fast the breathing is and how long Sessions last. Gentler formats often mix slow breathing, body scanning and movement. More intensive formats carry the same cautions as other connected or high-ventilation breathwork.

A body-oriented approach to trauma developed by Peter Levine that works with bodily sensations, titration and pendulation. It is delivered by trained practitioners as a form of therapy. Research is growing but still limited. Somatic Experiencing is a protected name, and Breath & Chill is not affiliated with it.

A non-diagnostic term for physical expressions such as trembling, movement, tears, sound, or shifts in tension during an embodied practice. These responses do not prove that trauma has been resolved. These reactions are common in connected breathing and usually pass on their own when the breath slows. Facilitators typically let them happen without encouraging or suppressing them. If a reaction feels overwhelming, slowing down, opening the eyes or pausing is always an option.

The planned use of music and sound across a session, often with an arc that builds, peaks and settles. Music influences pacing, mood and attention, which is why facilitators choose volume, rhythm and transitions with care and keep levels comfortable for hearing. Some facilitators also use live instruments such as drums, singing bowls or voice. Participants who are sensitive to sound can ask for earplugs or a spot further from the speakers.

A term introduced by psychotherapist John Welwood in the 1980s for using spiritual ideas or practices to avoid unresolved emotional, psychological or practical issues, for example insisting that everything happens for a reason in order to skip over grief. In breathwork it is a reminder to keep experiences grounded in everyday life and not to treat bliss or insight as a substitute for working with real difficulties. Signs can include avoiding anger or sadness, pressure to stay positive or using practice to escape decisions. Integration work helps link insights to everyday relationships and responsibilities.

A term coined by Stanislav and Christina Grof for intense experiences, such as vivid imagery, strong emotions or dissolving self-boundaries, that feel overwhelming or destabilising and that the person links to spiritual or inner growth. It is not a medical diagnosis, and the concept is debated, because similar symptoms can also point to a psychiatric or medical condition. Anyone who is unsure what is happening, or who struggles to function in daily life, should seek a doctor or a licensed mental-health professional. Grof and colleagues founded the Spiritual Emergence Network in 1980 to offer information and support. Today the DSM includes a category for religious or spiritual problems, which partly reflects this discussion.

Unplanned movements such as trembling, stretching, rocking, shaking or vocal sounds that sometimes arise during breathing practices. They are often described as a natural body response rather than something to push for or suppress. In yoga, the word "kriya" is also used for a different thing, a purification or breathing sequence, so context matters. They usually stop on their own when the breath slows. If movements feel too strong, opening the eyes or pausing helps you regain control.

A Czech-born psychiatrist who, together with Christina Grof, developed Holotropic Breathwork in the 1970s after earlier research on altered states. He is also a key figure in transpersonal psychology and introduced the concept of spiritual emergency. Some of his theories remain debated. Before developing Holotropic Breathwork, he conducted early clinical research with LSD in Prague and the United States. He has written many books, including The Holotropic Mind and, with Christina Grof, Holotropic Breathwork.

A rhythmic breathing sequence with cycles of slow, medium and fast breaths, taught by the Art of Living Foundation. The name is, to our understanding, a protected name; Breath & Chill is not affiliated with it and does not teach it. It is taught in the Foundation's courses, usually combined with ujjayi, bhastrika and meditation. Several studies have looked at it for stress, anxiety and depression with encouraging results, though many were small and some involved the organisation. It is learned in person from certified teachers rather than from written instructions.

The two main branches of the autonomic nervous system. The sympathetic branch generally raises arousal and readiness for action; the parasympathetic branch is associated with rest and recovery. The popular fight-or-flight versus rest-and-digest picture is a simplification, as both branches work together continuously. The vagus nerve carries much of the parasympathetic signalling to the heart, lungs and gut. Breathing is one of the few ways to influence this system on purpose: slow breathing with longer exhales tends to favour parasympathetic activity, while fast, forceful breathing tends to activate the sympathetic side.

A brief loss of consciousness caused by temporarily reduced blood flow to the brain. Fainting is not a desired breathwork outcome; stop the practice and seek medical assessment when appropriate. Warning signs include sudden light-headedness, tunnel vision, sweating or nausea. Lying down and slowing the breath usually helps. Practising lying or seated reduces injury risk.

Tetany is involuntary muscle stiffness or cramping, often in the hands, feet or around the mouth, caused by over-excitable nerves. In breathwork it usually follows fast breathing: lower CO₂ raises blood pH, less calcium stays freely available, and the hands may curl into a claw-like position that eases within minutes.

It is common in conscious connected breathing and usually not dangerous, though it can feel unsettling. Softening the breath, slowing the exhale and relaxing the hands typically lets it ease. Facilitators often explain it in advance so that participants are not alarmed if it appears. Persistent or severe symptoms, or tetany outside of breathwork, need medical assessment.

Breathing that moves mainly the upper chest and ribs. It is normal during exertion, but habitual chest-dominant breathing at rest can go along with tension or stress. Diaphragmatic and thoracic breathing are not opposites: healthy breathing typically uses both. Placing one hand on the chest and one on the belly is a simple way to notice which area moves more.

A yogic technique in which the inhale fills the belly, then the ribs, then the upper chest, and the exhale releases in reverse order. It is taught as a slow, relaxed way to become aware of the whole breathing movement and should never feel forced. It is often practised lying down with one hand on the belly and one on the chest to feel each part. Many people use it as a warm-up for other pranayama or for relaxation at the end of a yoga class. Breathing in a slow, comfortable rhythm keeps it gentle and avoids light-headedness.

Tidal volume is the amount of air moved in or out during one ordinary breath, roughly half a litre (about 500 ml, or around 7 ml per kilogram of ideal body weight) in a resting adult. Multiplied by respiratory rate, it gives minute ventilation, the total air breathed per minute.

Part of each breath stays in the airways and never reaches the air sacs (dead space), which is why slow, deeper breaths are often more efficient than fast, shallow ones. Breathwork can greatly increase tidal volume for a short time; calming practices usually keep it moderate.

Approaching intense experiences in small, manageable steps instead of all at once. In breathwork this can mean shorter rounds, gentler intensity, or pauses that let the nervous system settle between waves. The term is borrowed from chemistry, where a substance is added drop by drop. In somatic approaches it means touching difficult sensations briefly and then returning to something stable. It helps keep experiences within the window of tolerance.

Explicit, informed and revocable agreement before any physical contact in a session. Good practice is to ask in advance, offer a clear way to say no or change one's mind at any moment (for example a card or a signal), and make sure that declining never affects how a person is treated. Many sessions work entirely without touch. Consent given before a Session can be changed at any time, even mid-Session. Touch should be clearly explained in advance, for example a hand on the shoulder or gentle pressure on the feet.

A state of absorbed attention in which awareness of time, surroundings, or self may shift. Rhythm, repetition, music, movement, and breathing can contribute, but experiences differ widely. Everyday examples include getting lost in music, driving on autopilot or becoming absorbed in a book. In many cultures trance is part of ritual, often supported by drumming, chanting or dance. In breathwork, people usually stay aware enough to slow down or stop if they choose.

A movement-based practice combining breath awareness, rhythmic music, and intuitive dance, often with eyes covered. It works with similar mechanisms to breathwork — rhythm, attention, and embodied experience. Sessions often last one to two hours and include a short opening and closing circle. Because people move with eyes covered, a safe space and attentive helpers matter.

A branded connected-breathing method developed by Judith Kravitz that combines a continuous breath with body awareness, sound, movement, and facilitator support. Breath & Chill is not affiliated with it. The breath is usually open-mouthed and drawn into the belly and chest in a connected rhythm, and Sessions often include acupressure points, toning and affirmations. Like other connected-breathing methods, it can bring up strong emotions and physical sensations. Screening and experienced facilitation are important, especially for first-time participants.

A field of psychology that studies experiences extending beyond the ordinary sense of self, including spiritual and altered-state experiences. It helped shape the framework around Holotropic Breathwork and related practices. It emerged in the late 1960s, with founders including Abraham Maslow and Stanislav Grof. It remains outside mainstream academic psychology, and many of its ideas are hard to test scientifically.

An approach that assumes some participants carry difficult past experiences and therefore emphasizes safety, choice, transparency, and the freedom to pause or opt out. It is a way of working, not a form of treatment, and it cannot guarantee that nobody will feel distress. In practice this includes clear explanations, asking consent before touch, offering alternatives and inviting people to stop whenever they want. It does not replace trauma therapy. The US agency SAMHSA describes six key principles: safety, trustworthiness and transparency, peer support, collaboration, empowerment and choice, and attention to cultural, historical and gender issues. A trauma-informed facilitator does not need to know anyone's history, because the same respectful options are offered to everyone.

A set of exercises developed by David Berceli that aims to evoke neurogenic tremor to release muscular tension. Evidence for its effects is limited. It involves strong physical sensations and is best learned from a trained provider. TRE is a registered name, and Breath & Chill is not affiliated with it.

A Tibetan Buddhist practice that combines breathing, visualization, and bodily discipline within a wider contemplative tradition. It influenced some modern breathing systems but is not identical to the Wim Hof Method. Tummo means inner fire, and studies of experienced practitioners have shown measurable rises in body temperature during practice. It is traditionally learned from a qualified teacher over a long time within the tradition. Simplified modern versions with forceful breathing and holds carry the same cautions as other intensive techniques.

A pranayama technique in which the throat is slightly narrowed so the breath makes a soft, ocean-like sound. It is commonly used in yoga to slow and steady the breath. It is sometimes called victorious breath or ocean breath and is usually practised through the nose with the mouth closed. The sound gives an easy focus for attention and helps keep the breath slow and even. It should feel soft and effortless; straining the throat is a sign to ease off.

Vagus nerve is the common name for the tenth cranial nerve, the main nerve of the parasympathetic nervous system. It runs from the brainstem through the neck to the heart, lungs and gut, helping to slow the heart and support digestion while carrying body signals back to the brain.

Its name comes from the Latin word for wandering. Slow breathing with long, gentle exhales is associated with more vagal influence on the heart, visible as greater heart-rate variability. Popular claims about toning or resetting the vagus nerve often go beyond what research currently shows.

Ventilation is the movement of air; oxygenation is the transfer and carriage of oxygen in blood. Breathing more does not automatically mean tissues receive more usable oxygen. Over-breathing mainly removes CO₂, which can even make oxygen release to tissues slightly harder via the Bohr effect. Understanding this difference helps explain why intense breathing feels so strong without supplying extra energy. Oxygenation is commonly estimated with a pulse oximeter, which in healthy people at rest usually reads around 95 to 100 percent. Ventilation is better reflected by carbon dioxide levels, because CO₂ falls quickly when we breathe more than the body needs.

The largest volume of air a person can breathe out after a full inhale, usually measured with spirometry. It varies with age, sex, height and health. It describes lung size and function, not breathing quality, and it is not trained by most breathwork methods. In healthy adults it is often around three to five litres. Some trained athletes, swimmers and wind musicians have a larger vital capacity.

A connected-breathing method created by Jim Leonard in 1979. It emphasizes awareness of sensation, relaxation, and integrating experience rather than pursuing catharsis. Its five elements are circular breathing (an unbroken, continuous rhythm with no pauses between inhale and exhale), complete relaxation (releasing physical effort and tension, especially on the exhale), awareness in detail (focusing directly on the strongest physical sensations without mental stories, judgments or dramatic narratives), integration into ecstasy (shifting context to stay open to the underlying pleasure or positive feeling within the experience) and willingness is enough (trusting the process, because no perfection or forced effort is needed for the technique to work). The breath is usually gentler than in Holotropic Breathwork, and practitioners can learn to use it on their own after guided Sessions. Leonard originally trained in Rebirthing before developing his own approach.

A deliberately chosen pause in breathing. Carbon dioxide usually rises during the pause and oxygen may fall; duration and risk vary with the preceding breathing, the person, and the setting. The urge to breathe is triggered mainly by rising CO₂, not falling oxygen. Breathing fast beforehand lowers CO₂ and delays that warning signal, which can let oxygen fall far enough to cause blackout. That is why holds after hyperventilation are never done in water, standing or while driving.

Breath holds, rapid breathing, and intense breathing exercises must not be practised in water, while driving, or anywhere a brief loss of awareness could cause harm. Practise seated or lying down in a safe place. Over-breathing before a hold can cause a blackout without warning. This rule applies to all levels of experience. Shallow water blackout, fainting during a breath hold in water, has caused deaths even among experienced swimmers and divers. Breathing recordings and apps should therefore never be used in the car, the bath or the pool.

Wim Hof Method is a branded system popularised by the Dutch athlete Wim Hof that combines rounds of deep breathing and breath retention with cold exposure and mindset training. A round uses 30 to 40 deep breaths, then a hold after exhaling. Never practise it in water or while driving.

A 2014 study reported that trained participants showed an altered inflammatory response to an injected bacterial toxin. People with heart problems, epilepsy, high blood pressure or pregnancy should get medical advice before trying it.

A concept from trauma-informed work describing the range of arousal in which a person can feel, think, and stay present without becoming overwhelmed or shut down. Intense breathing can move people toward the edges of this range, which is why pacing and the freedom to slow down matter. The term was introduced by psychiatrist Daniel Siegel. Above the window people may feel anxious or flooded; below it, numb or shut down. A good session lets participants widen their window gradually rather than pushing past it.

A guided relaxation practice done lying down, usually combining a body scan, breath awareness and attention exercises. The modern form is largely associated with Swami Satyananda Saraswati. Early research looks at stress and sleep, but the evidence base is still small. It is often translated as yogic sleep, because the aim is deep rest while staying aware. Sessions typically last 20 to 45 minutes and are suitable for most people.