- Golfer Padraig Harrington uses cryotherapy as part of his fitness regime
- The deep-freeze treatment is increasingly popular with professional athletes
- Athletes enter a chamber that is chilled to -130 degrees Celsius (-200 ˚F)
- New York salon owner says cryotherapy creates such a high it's like "legal doping"
(CNN)Would you dare to freeze yourself fit by stepping into a chilling chamber colder than Antarctica?