Patients or post-operative clients, high load and high strength workouts may not be clinically suitable.
Blood Circulation Limitation (BFR) training is a technique that combines low strength workout with blood flow occlusion that produces similar results to high strength training. It has actually been used in the health club setting for a long time but it is acquiring popularity in clinical settings. Blood Circulation Restriction (BFR) Training [modify edit source] BFR training was initially developed in the 1960's in Japan and referred to as KAATSU training.
It can be used to either the upper or lower limb. The cuff is then pumped up to a specific pressure with the objective of obtaining partial arterial and total venous occlusion. Muscle hypertrophy is the boost in size of the muscle as well as an increase of the protein content within the fibers.
Muscle tension and metabolic tension are the 2 main elements accountable for muscle hypertrophy. Mechanical Stress & Metabolic Stress [edit edit source] When a muscle is placed under mechanical stress, the concentration of anabolic hormone levels increase. The activation of myogenic stem cells and the raised anabolic hormones result in protein metabolic process and as such muscle hypertrophy can take place.
Insulin-like development aspect and growth hormonal agent are responsible for increased collagen synthesis after exercise and help muscle healing. Development hormone itself does not straight cause muscle hypertrophy but it helps muscle recovery and thus potentially helps with the muscle enhancing procedure. The build-up of lactate and hydrogen ions (eg in hypoxic training) more boosts the release of growth hormone.
Myostatin controls and inhibits cell growth in muscle tissue. It requires to be basically shut down for muscle hypertrophy to occur. Resistance training results in the compression of blood vessels within the muscles being trained. This triggers an hypoxic environment due to a decrease in oxygen shipment to the muscle.
When there is blood pooling and an accumulation of metabolites cell swelling occurs. This swelling within the cells causes an anabolic reaction and results in muscle hypertrophy.
The cuff is put proximally to the muscle being exercise and low strength exercises can then be performed. Because the outflow of blood is limited utilizing the cuff capillary blood that has a low oxygen content gathers and there is a boost in protons and lactic acid. The exact same physiological adaptations to the muscle (eg release of hormones, hypoxia and cell swelling) will happen during the BFR training and low intensity exercise as would accompany high strength workout.
( 1) Low intensity BFR (LI-BFR) leads to a boost in the water content of the muscle cells (cell swelling). It likewise speeds up the recruitment of fast-twitch muscle fibers. It is likewise hypothesized that when the cuff is removed a hyperemia (excess of blood in the capillary) will form and this will trigger additional cell swelling.
These increases resembled gains obtained as a result of high-intensity exercise without BFR A research study comparing (1) high intensity, (2) low strength, (3) low and high strength with BFR and (4) low strength with BFR. While all 4 exercise regimes produced increases in torque, muscle activations and muscle endurance over a 6 week period - the high intensity (group 1) and BFR (groups 3 and 4) produced the best impact size and were equivalent to each other.