Intensive breathing and breath-holding must never take place in water or situations where fainting would be dangerous. This also applies before diving and while driving. This article explains how to assess the Wim Hof Method, not a breath-holding or cold-training routine to copy. [1]
Three components, different questions
The method combines specific breathing exercises, cold exposure and mental exercises. This combination has been investigated under research conditions. It does not follow that each individual component independently produces the same effect or that more intense practice is best. [2]
| Component | Important consideration |
|---|---|
| Intensive breathing exercises | No practice in water, while driving or where falling is a risk. |
| Cold exposure | Consider separate risks for breathing, circulation and a safe return. |
| Mental exercises | Do not equate subjective experience with evidence about disease. |
| Complete training package | Do not attribute findings to individual components without assessment. |
What the 2014 experiment showed
Kox and colleagues compared twelve trained with twelve untrained healthy men. Following a controlled endotoxin challenge, changes included adrenaline and inflammatory responses, with fewer flu-like symptoms in the trained group. This was not treatment of an actual infection or a chronic autoimmune condition. [2]
The finding is a research observation under restricted conditions. It does not justify saying that people can control immunity at will, breathe away diseases or replace prescribed treatment.
The most important separation: breathing exercises and water
The provider's own page warns of possible loss of consciousness and requires a safe seated or lying position. It explicitly warns against practice in water and while driving. These provider instructions are cited here as warnings, not independent evidence of effectiveness. [1]
Dizziness, marked tingling and feeling unwell are not performance goals. Stop the exercise and return to normal breathing. Fainting or persistent severe symptoms require medical help. There is no reason to disregard warning signs for a time record.
Cold water is not a harmless addition
The water-rescue organization RNLI explains that cold water can cause involuntary gasping, loss of breathing control and substantial cardiovascular strain. The initial danger does not begin only after prolonged cooling. [3]
A breathing technique does not remove this risk. This overview therefore gives no target temperature, exposure duration or breath-holding time. With existing illnesses or unclear suitability, avoid intensive self-experimentation and seek professional assessment.
Frequently asked questions
Can I do the breathing exercises in a bath or pool?
No. Intensive breathing exercises and breath-holding must not be combined with water activities.
Does the study prove a cure for infections?
No. A controlled endotoxin challenge in healthy men was investigated.
Is a stronger reaction always better?
No. Dizziness or feeling unwell does not demonstrate greater benefit.
Can cold replace my treatment?
No such recommendation follows from the findings discussed.
Read more: Cold, stress hormones and inflammation promises and Recovery without performance pressure.
Sources
[1] Wim Hof Method: Breathing exercises, used only for provider safety instructions. [2] Kox et al., PNAS, 2014. [3] RNLI: Cold water shock. Sources linked in the text; editorial review: September 29, 2026. Not instructions for risky breathing or water exercises.
Existing video: separate review outstanding
The video originally embedded in the English article has been retained. Its content and playback have not been independently reviewed and are not the basis for this article's recommendations. A separate review is required before publishing the English locale. Do not follow breathing instructions in water or unsafe situations.
