Cryotherapy is exposure to subzero temperatures. The extreme temperature stimulates skin sensors, activating a Central Nervous System (CNS) response. This causes the release of endorphins, the body's natural pain inhibitors and mood elevators, while the enhanced circulation activity (blood movement into and out of the core) decreases inflammation by clearing toxins and metabolic waste with a supply of oxygen and nutrient-enriched blood to stimulate cellular regeneration (faster healing).