Wim Hof teaches an intense breathing technique but is it dangerous? What effect can it have on your health? What is the Wim Hoff method?
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The Oxygen Advantage: The Simple, Scientifically Proven Breathing Techniques for a Healthier, Slimmer, Faster, and Fitter You: Patrick McKeown: 9781504697316: : Books
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Breathing to reduce stress and for good health – the Wim Hof, wim hof breathing
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Is anyone aware of any negative physiological effects in the Wim Hof cold shock, breathing exercises? - Quora
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Wim Hof Method Of Breathing: Can It Be Dangerous? Buteyko Breathing Center