The Way of the Iceman: How the Wim Hof Method Creates Radiant Long-term Health—Using the Science and Secrets of Breath Control, Cold-Training and Commitment

by Wim Hof

Konstantin Buteyko emphasizes the importance of more shallow breathing and says that breathing in through the nose is sufficient to ensure that you do not breathe too deeply. Wim Hof’s breathing techniques, which involve breathing in deeply and then exhaling slowly, seem to be completely at odds with this. Yet, after doing these exercises, most people start to breathe more calmly, and their carbon dioxide levels return to normal. The big difference is that during the exercises, your breathing is controlled. People with asthma breathe too deeply and cannot control it.