Time under tension decreased with blood flow–restricted exercise

Abstract

These results may benefit populations that cannot sustain the mechanical stress of high-intensity exercise or low-intensity exercise that requires a longer sustained time under tension.

Exercise and Blood Flow Restriction

“…The authors found that both conditions similarly elevated HR to approximately 200 b$min21 at 10 seconds postexercise. Furthermore, Loenneke et al (54) observed similar HR responses during 2 sets of bilateral knee extensions to failure, at 30% of 1RM with BFR via elastic knee wraps and without BFR. Collectively, these findings indicate that an increased HR response may be inevitable with or without BFR when exercise is performed to repetition failure.…”

The acute muscular effects of cycling with and without different degrees of blood flow restriction

“…Several studies using BFR in combination with low load resistance exercise have observed increases in WBL (15,26,40). The accumulation of this lactate along with other metabolites has been hypothesized to play an important role in skeletal muscle adaptation through increased muscle fiber recruitment (20).…”

“…Participants cycled at 202 (36), 97 (26), and 97 (26) watts during the High, 40BFR, and 60BFR conditions. The wattage used during exercise was significantly higher in the High compared to the other conditions (p < 0.001).…”

“…To illustrate, acute muscle swelling has been observed with slow (56 m/min) and fast BFR walking (87 m/min) without a significant decrease in torque (31), suggesting that muscle fatigue may not be a prominent mechanism with low intensity aerobic exercise. Further, walking at slow speeds does not result in an accumulation of metabolites in the blood (75 m/min) (24), although cycling at 40% of VO2 max does increase lactate levels over baseline values (~2 mmol/L increase) (13), albeit to a lesser extent than that observed with resistance training (26). Therefore, it appears that the predominant mechanism behind the benefits observed with BFR aerobic exercise at low intensities may be the acute increase in muscle cell volume and this increase in cell volume may also be responsible for the increased ERK ½ and p38 phosphorylation and for the decreased phosphorylation of eEF2 observed in young men walking under BFR at 55% VO2 max (32).…”

I SAFS UniCatólica 2015

“…As associações entre o treino de oclusão vascular e o lactato sanguíneo tem sido discutido quando se trata de controle de intensidade de treino e a relação desta intensidade com processos metabólicos específicos (Gil et al, 2015;Loenneke, Wilson, Balapur, et al, 2012;Yasuda et al, 2014). No nosso estudo, ficou evidente que o treino sob oclusão vascular induziu aumentos significativos do lactato sanguíneo em diferentes momentos (meio e final do treino) quando comparados aos valores basais, bem como no grupo que treinou sob alta intensidade, que apesar de não ter sido observada a significância, observou-se valores altos de lactato.…”