Blood flow restriction (BFR) training is a training strategy involving the use of cuffs placed around a limb during exercise, to maintain arterial inflow to the muscle while preventing venous return. BFR can be used with resistance training, or with other modalities, including walking.
Blood flow restriction allows for those who are recovering from an injury to maintain and build muscle without causing strenuous load on injured tissue.
Evidence suggests resistance training with BFR might improve muscular power, sprint running speed, and endurance. In addition, non-resistance training methods (like walking) with BFR can cause hypertrophy.
Programs of resistance training with BFR and low loads appear to increase strength more than resistance training without BFR when using similar loads. It has also been shown to improve muscle recruitment.