Not doing this yet but it seems interesting. Blood flow restriction for training and recovery.
https://www.nytimes.com/2021/07/21/s...sultPosition=1
No, there is no outbreak of cuts. But the American swimmer Michael Andrew is wearing tourniquet-like bands in the practice pool. Galen Rupp, the defending bronze medalist in the marathon, sometimes straps similar bands to his legs while training.
They are among the elite athletes who have become disciples of a practice known as blood flow restriction, which is exactly what it sounds like: cutting off blood flow to certain muscles for limited periods to both enhance the effects of training and stimulate recovery.