Dr. James Stray-Gunderson who is the developer and co-founder of the (B)Strong BFR Training System. BFR stands for blood flow restriction. Dr. Stray Gunderson states that BFR training is an exercise technique that manipulates the body circulatory system and when combined with exercise produces rapid gains in strength and fitness using light loads and in a very short period of time. We will talk with Dr. Stray-Gunderson about the technique and the science behind these claims.