As you enter the Cryotherapy Chamber the sudden drop in heat stimulates the temperature receptors, prompting the brain to transmit messages throughout the body. This withdraws blood from the body's core to try to regulate the temperature.
When you exit the Cryotherapy Chamber, blood is pumped vigorously around the body, which in turn enhances the oxygen supply and removal of toxins. The cold also triggers the nervous system to release feel-good endorphins, plus the body's natural anti-inflammatory reaction to extreme cold results in a pain reduction.