“Sato had an epiphany in 1966. He was busy attending a funeral service. He ended up having to sit in a certain position where we would say our legs fell asleep. When he tried to get up, his legs didn’t work very well. This reminded him of when he would exhaust himself with heavy weightlifting. That just kind of stuck in his mind …

BFR training was developed by Dr. Yoshiaki Sato in Japan in the mid-’60s, where it’s known as KAATSU training. Stray-Gundersen met Sato and worked with his organization, KAATSU Global, for a while. Stray-Gundersen explains the history and origins of this breakthrough system:



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