Blood Flow Restriction Training - Physiopedia

1. Clients or post-operative clients, high load and high strength exercises may not be clinically appropriate. Blood Flow Limitation (BFR) training is a strategy that integrates low strength workout with blood circulation occlusion that produces comparable outcomes to high intensity training. It has been used in the gym setting for some time but it is acquiring appeal in medical settings. Blood Circulation Restriction (BFR) Training [modify modify source] BFR training was at first developed in the 1960's in Japan and called KAATSU training. It can be applied to either the upper or lower limb. The cuff is then inflated to a particular pressure with the goal of acquiring partial arterial and complete venous occlusion. The client is then asked to perform resistance exercises at a low intensity of 20-30% of 1 repeating max (1RM), with high repeatings per set (15-30) and short rest periods in between sets (30 seconds) Comprehending the Physiology of Muscle Hypertrophy. [edit modify source] Muscle hypertrophy is the increase in size of the muscle in addition to a boost of the protein material within the fibres. Muscle stress and metabolic stress are the two main factors responsible for muscle hypertrophy. Mechanical Stress & Metabolic Tension [edit modify source] When a muscle is put under mechanical tension, the concentration of anabolic hormonal agent levels increase. The activation of myogenic stem cells and the raised anabolic hormones lead to protein metabolic process and as such muscle hypertrophy can happen. Insulin-like development aspect and growth hormone are responsible for increased collagen synthesis after exercise and aids muscle healing. Growth hormone itself does not directly cause muscle hypertrophy but it helps muscle recovery and therefore potentially helps with the muscle enhancing process. The accumulation of lactate and hydrogen ions (eg in hypoxic training) further increases the release of development hormone. Myostatin controls and hinders cell growth in muscle tissue. It needs to be essentially shut down for muscle hypertrophy to occur. Resistance training leads to the compression of blood vessels within the muscles being trained. This triggers an hypoxic environment due to a reduction in oxygen shipment to the muscle. This results in a boost in anaerobic lactic metabolic process and the production of lactate. When there is blood pooling and a build-up of metabolites cell swelling happens. This swelling within the cells triggers an anabolic response and leads to muscle hypertrophy. The cell swelling may in fact cause mechanical stress which will then trigger the myogenic stem cells as talked about above. The cuff is positioned proximally to the muscle being exercise and low strength workouts can then be performed. Since the outflow of blood is restricted utilizing the cuff capillary blood that has a low oxygen material gathers and there is an increase in protons and lactic acid. The exact same physiological adjustments to the muscle (eg release of hormones, hypoxia and cell swelling) will happen during the BFR training and low strength workout as would happen with high strength workout. ( 1) Low strength BFR (LI-BFR) leads to an increase in the water material of the muscle cells (cell swelling). It likewise speeds up the recruitment of fast-twitch muscle fibres. It is likewise assumed that when the cuff is gotten

2. rid of a hyperemia (excess of blood in the capillary) will form and this will cause additional cell swelling. These increases were similar to gains gotten as an outcome of high-intensity workout without BFR A study comparing (1) high intensity, (2) low intensity, (3) low and high intensity with BFR and (4) low strength with BFR. While all 4 workout programs produced boosts in torque, muscle activations and muscle endurance over a 6 week duration - the high strength (group 1) and BFR (groups 3 and 4) produced the greatest effect size and were comparable to each other.