These blood flow restriction bands reduce oxygen delivery to muscles to pre-fatigue slow muscle fibers and reduce their response to exercise loads. INCREASE MUSCLE GROWTH FACTORS : Studies show that exercise can increase muscle protein synthesis, NOS-1 expression, and mTOR signaling, leading to increased muscle growth. Studies also show how tourniquets can be used in exercise to increase muscle growth and improve muscle growth potential by reducing myostatin levels. FASTER LARN MUSCLES AND EXCELLENT TONE WITHOUT LIFTING HEAVY WEIGHTS: Occlusion training bands cause very low load hypertrophy (typically 10-30 percent of 1RM). When applied to working legs and combined with loads of 10 to 30% of 1RM (lots of reps and very little rest before fatigue sets in), results are generally close to those obtained with 80% of 1RM. In fact, bands easily and without lifting heavy weights deliver lean muscle and great sound. EXTRA STRONG AND SUPER COMFORTABLE STRIPS: Pro Package Training Straps are easy to attach, easy to remove as soon as the workout is over, and incredibly comfortable on the working leg. Per package order comes with 4 tourniquets for training. 'occlusion. If you use the bicep strap or the thigh strap, it retains its shape and elasticity.