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

The less intense the activity, the more low-energy fats are used as fuel. More intense efforts make use of more free ATP. The energy generated is released by the breakdown of organic compounds. This process can take place with oxygen (aerobic) or without it (anaerobic).