Cryotherapy and thermal shock
Health professionals talk about thermal shock when the skin temperature oscillates between 18° and 12°C. The vital organs are then strongly stimulated and must increase the production of blood flow to protect the body from the cold. A vasoconstriction phenomenon then occurs (the diameter of the blood vessels decreases). The response mechanisms to intense cold have analgesic and anti-inflammatory effects. Adrenaline is released into the bloodstream. This increases heart rate, muscle strengthening and blood pressure. The release of endorphins is important. To regulate body temperature, the body burns calories to return to its normal temperature.