Blood Flow Restriction (BFR) is an emerging modality that has been used in the US military over the years and is starting to gain traction with athletes and weight lifters. Started in 1994 when Yoshiaki Sato developed the Kaatsu method.
BFR is training that involves the usage of cuffs or wraps placed around a specific limb during exercise. It maintains arterial inflow to the muscle while preventing venous return. BFR can be used with resistance training or with other modalities including walking. It is primarily used to gain strength but can also be used to help with power and endurance.
Some of the long term effects blood flow restriction training has been shown to have is an increase in muscular power, improvements in endurance measurements, increase in muscle size, and shows similar strength increases compared to that of higher load resistance training.
You can use blood flow resistance training in clinics for patients that have a limitation on the amount of weight they are able to train with as well it puts lest tension and stress on the ligaments, tendons, and joints.