Wim Hof is an autodidact and taught himself how to control his heart rate, breathing and blood circulation. All this is regulated by the autonomic nervous system.
Science says that the autonomic nervous system is a part of the body you just can´t control, yet Wim can, by steering his hypothalamus (an area in the brain which regulates the body temperature).
Where the body temperature of an untrained person drops dangerously after exposing it to extreme cold, Wim is able to retain his core temperature around 37 degrees Celsius, constantly. Even after 1 hour and 52 minutes sitting in ice, Wim’s core temperature stays the same.
Scientists around the world baffled by this exceptional performance.
In the Netherlands, Prof. Maria Hopman of the UMC St Radboud Nijmegen examined Wim’s physiology as he was affected by the cold, while he was up to his neck in a cylinder filled with ice cubes.