nytimes July 21, 2021 3:00pm A Hot Fitness Trend Among Olympians: Blood Flow Restriction #olympicgames2020 #exercise #blood #swimming #andrewmichael1999 #ruppgalen #satoyoshiaki #news A Hot Fitness Trend Among Olympians: Blood Flow Restriction Some athletes in Tokyo are indulging in a trendy technique to enhance the effects of training and stimulate recovery. Credit a Japanese former power lifter.