Jessee Matthew B, Dankel Scott J, Buckner Samuel L, Mouser J Grant, Mattocks Kevin T, Loenneke Jeremy P
Kevser Ermin Applied Physiology Laboratory, University of Mississippi, Health, Exercise Science, and Recreation Management, University, United States.
Int J Sports Med. 2017 Jul;38(8):597-603. doi: 10.1055/s-0043-109555. Epub 2017 Jun 26.
This study sought to compare cardiovascular and perceptual responses to blood flow restriction (BFR) exercise using various pressure and load combinations. Fourteen participants completed four sets of BFR elbow flexion using 10, 15 and 20% 1RM with 40 and 80% arterial occlusion pressure (AOP). AOP was measured before and after exercise. Perceived exertion (RPE) and discomfort were assessed before exercise and after each set. Data presented as mean (95% CI), except for RPE and discomfort: 25, 50, 75 percentiles. AOP increased post-exercise (p<0.001) with larger magnitudes seen when increasing load and pressure (p<0.001) [e. g., 10/40 ΔAOP: 21 (10, 32) mmHg vs. 20/80 ΔAOP: 62 (45, 78) mmHg], which also augmented RPE (p<0.001) [e. g., 4th set 10/40: (7, 8.5, 12) vs. 4th set 20/80: (12.75, 15.5, 17.25)] and discomfort (p<0.001) [e. g., 4 set 10/40: (0.75, 2, 4.25) vs. 4 set 20/80: (4.25, 6, 8,)]. Volume increased via greater loads (p<0.001), and participants only reached failure during 20% 1RM conditions [20/40: 74 (74, 75) repetitions; 20/80: 71 (68, 75) repetitions]. When performing BFR exercise with very low loads the magnitudes of the cardiovascular and perceptual responses are augmented by increasing the load and by applying a higher relative pressure.
本研究旨在比较使用不同压力和负荷组合进行血流限制（BFR）运动时的心血管反应和感知反应。14名参与者使用10%、15%和20%的1RM以及40%和80%的动脉闭塞压力（AOP）完成了四组BFR屈肘运动。在运动前后测量AOP。在运动前和每组运动后评估主观用力程度（RPE）和不适感。数据以平均值（95%CI）表示，RPE和不适感除外：第25、50、75百分位数。运动后AOP升高（p<0.001），增加负荷和压力时升高幅度更大（p<0.001）[例如，10/40时AOP的变化量：21（10，32）mmHg，而20/80时AOP的变化量：62（45，78）mmHg]，这也增加了RPE（p<0.001）[例如，第4组10/40时：（7，8.5，12），而第4组20/80时：（12.75，15.5，17.25）]和不适感（p<0.001）[例如，第4组10/40时：（0.75，2，4.25），而第4组20/80时：（4.25，6，8）]。通过增加负荷，运动量增加（p<0.001），并且参与者仅在20%1RM条件下达到疲劳[20/40：74（74，75）次重复；20/80：71（68，75）次重复]。当以非常低的负荷进行BFR运动时，增加负荷并施加更高的相对压力会增强心血管反应和感知反应的幅度。
