Circuit training without external load induces hypertrophy in lower-limb muscles when combined with moderate venous occlusion

Exercise and Blood Flow Restriction

“…Numerous HSPs have been identified, each of which are named according to their molecular mass in kilodaltons (i.e., HSP27, HSP60, HSP70, and HSP72), and their transcription can be induced by a variety of factors including ROS, hypoxia, acidosis, and ischemia/reperfusion (44). Given that increases in HSP--72 correlated with a significant increase in muscle hypertrophy, Ishii et al (37) hypothesized a possible casual role in postexercise muscular development via BFR training. Conversely, Fry et al (25) found no differences in total protein content of HSP70 after BFR exercise at 20% 1RM in elderly men.…”

“…Perhaps the key aspect of BFR training is the unexpectedly low relative intensity at which the adaptations are stimulated to occur. Numerous studies examining BFR reported increased muscle cross--sectional area (CSA) and strength after BFR plus walking (2), BFR plus cycling (1), BFR plus body weight circuit training (37), and BFR plus resistance training with 20% of a 1RM load (5)-far below the typical intensities thought necessary to induce hypertrophic and strength adaptations (7). However, it should also be noted that the application of BFR in the absence of exercise has been shown to prevent reductions in muscle strength and size because of prolonged periods of disuse and immobilization.…”

Corticospinal excitability changes following blood flow restriction training of the tibialis anterior: a preliminary study

“…The TA has not been targeted previously in BFRT regimes but as BFRT is successful in increasing strength in most other trialled muscles (such as the ankle [1, 2, 3] and knee extensors [4, 5, 6, 7]) it is unlikely that strength increases do not occur in the TA. Despite this, increased corticospinal excitability is different to increased strength and prolonged corticospinal excitability changes may not occur for the TA.…”

“…Blood flow restriction training (BFRT) successfully increases strength, endurance and muscle size compared to conventional (non BFRT) training in the ankle extensors [1, 2, 3] and knee extensors [4, 5, 6, 7] following training regimes for periods of up to 8 weeks. In addition, cortical excitability can increase following single bouts of low load BFRT that are greater than comparable low load training without blood flow restriction [8].…”

The Effect of Short-Term Resistance Training on Heart of Nonathletic Healthy Male Students by Echocardiograph

“…A correct planning of the weight training program is usually mixed with the training of the lower limb and upper limb muscular groups that may not be possible in many aerobic activities including walking and biking (47). Evidences show that the effects of resistance trainings depend of the intensity, volume and the resting interval between training rounds (48,49). After circuit weight trainings, the endurance, the strength and the pumping capacity of the heart increase (50, 51).…”