Zhu Wenyuan G, Yitzchaki Noam, Kuehne Tayla E, Kataoka Ryo, Mattocks Kevin T, Buckner Samuel L
Exercise Science Program, University of South Florida, Tampa, FL, USA.
Exercise Science Program, Lindenwood University, Bellville, MO, USA.
Int J Exerc Sci. 2020 Dec 1;13(2):1807-1818. doi: 10.70252/RFNQ1161. eCollection 2020.
Changes in muscle thickness (MT), isometric torque, and arterial occlusion pressure (AOP) were examined following four sets of twenty unilateral elbow flexion exercise. Participants performed four sets of maximal voluntary contractions with no external load throughout a full range of motion of a bicep curl with and without the application of blood flow restriction (BFR). For torque there was an interaction ( = 0.012). The BFR condition had lower torque following exercise (56.07 ± 17.78 Nm) compared to the control condition (58.67 ± 19.06 Nm). For MT, there was a main effect for time ( < 0.001). MT increased from pre (3.52 ± .78cm) to post (3.68 ± 81cm) exercise and remained increased above baseline 15 min post-exercise. For AOP, there was an interaction ( = 0.027). The change in AOP was greater in the BFR condition (16.6 ± 13.42mmHg) compared to the control (11.1 ± 11.84 mmHg). NO LOAD exercise with BFR let to greater reductions in torque and an exaggerated cardiovascular response compared to exercise alone. There were no differences in swelling. These results suggest that the application of BFR to NO LOAD exercise may result in greater fatigue.
在进行四组每组二十次的单侧肘部屈曲运动后，对肌肉厚度（MT）、等长扭矩和动脉闭塞压（AOP）的变化进行了检查。参与者在有和没有应用血流限制（BFR）的情况下，在二头肌卷曲的全范围运动中进行了四组无外部负荷的最大自主收缩。对于扭矩，存在交互作用（= 0.012）。与对照条件（58.67±19.06 Nm）相比，BFR条件下运动后的扭矩较低（56.07±17.78 Nm）。对于MT，时间存在主效应（<0.001）。MT从运动前（3.52±.78cm）增加到运动后（3.68±81cm），并在运动后15分钟保持高于基线水平。对于AOP，存在交互作用（= 0.027）。与对照（11.1±11.84 mmHg）相比，BFR条件下AOP的变化更大（16.6±13.42 mmHg）。与单独运动相比，BFR无负荷运动导致更大的扭矩降低和夸张的心血管反应。肿胀方面没有差异。这些结果表明，在无负荷运动中应用BFR可能会导致更大的疲劳。
