Olympic and professional athletes from the NFL, NBA, MLB, NHL, MMA, Crossfit, etc. have been using Whole Body Cryotherapy in the U.S. since 2011. Initially these machines were only available in professional athlete training facilities and generally not available to the general public. As more and more high profile athletes and celebrities use cryotherapy, it has become more mainstream and more widely used as availability for general use has risen.
Professional athletes swear by it! Hollywood stars and models love it!