Wim Hof Method

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 practice 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.