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

Breathe in deeply, without forcing yourself, and then out again slowly. By not fully breathing out, a small amount of air remains behind in the lungs. After doing that 30 times, hold your breath after breathing out, and wait until you feel the need to breathe in again. Repeat this exercise until you feel tingling, light in the head, or sluggish.