Mattocks Kevin T, Jessee Matthew B, Counts Brittany R, Buckner Samuel L, Grant Mouser J, Dankel Scott J, Laurentino Gilberto C, Loenneke Jeremy P
Department of Health, Exercise Science, and Recreation Management. Kevser Ermin Applied Physiology Laboratory, The University of Mississippi, MS, United States.
Department of Health, Exercise Science, and Recreation Management. Kevser Ermin Applied Physiology Laboratory, The University of Mississippi, MS, United States.
Physiol Behav. 2017 Mar 15;171:181-186. doi: 10.1016/j.physbeh.2017.01.015. Epub 2017 Jan 11.
Recent studies have investigated relative pressures that are applied during blood flow restriction exercise ranging from 40%-90% of resting arterial occlusion pressure; however, no studies have investigated relative pressures below 40% arterial occlusion pressure. The purpose of this study was to characterize the cardiovascular and perceptual responses to different levels of pressures. Twenty-six resistance trained participants performed four sets of unilateral elbow flexion exercise using 30% of their 1RM in combination with blood flow restriction inflated to one of six relative applied pressures (0%, 10%, 20%, 30%, 50%, 90% arterial occlusion pressure). Arterial occlusion pressure was measured before (pre) and immediately after the last set of exercise at the radial artery. RPE and discomfort were taken prior to (pre) and following each set of exercise. Data presented as mean (95% CI) except for perceptual responses represented as the median (25th, 75th percentile). Arterial occlusion pressure increased from pre to post (p<0.001) in all conditions but was augmented further with higher pressures [e.g. 0%: 36 (30-42) mmHg vs. 10%: 39 (34-44) mmHg vs. 90% 46 (41-52) mmHg]. For RPE and discomfort, there were significant differences across conditions for all sets of exercise (p<0.01) with the ratings of RPE [e.g. 0%: 14.5 (13, 17) vs. 10%: 13.5 (12, 17) vs. 90%: 17 (14.75, 19) during last set] and discomfort [e.g. 0%: 3.5 (1.5, 6.25) vs. 10%: 3 (1, 6) vs. 90%: 7 (4.5, 9) during last set] generally being greater at the higher restriction pressures. All of these differences at the higher restriction pressures occurred despite completing a lower total volume of exercise. Applying higher relative pressures results in the greatest cardiovascular response, higher perceptual ratings, and greater decrease in exercise volume compared to lower restriction pressures. Therefore, the perceptual responses from lower relative pressures may be more appealing and provide a safer and more tolerable stimulus for individuals.
最近的研究调查了血流限制运动期间所施加的相对压力，范围为静息动脉闭塞压的40%-90%；然而，尚无研究调查低于动脉闭塞压40%的相对压力。本研究的目的是描述对不同压力水平的心血管和感知反应。26名经过阻力训练的参与者进行了四组单侧肘部屈曲运动，使用其1RM的30%并结合血流限制，将其充气至六种相对施加压力之一（0%、10%、20%、30%、50%、90%动脉闭塞压）。在桡动脉处测量最后一组运动前（预）和运动后即刻的动脉闭塞压。在每组运动前（预）和运动后记录RPE（主观用力感觉）和不适感。数据以均值（95%可信区间）呈现，感知反应以中位数（第25、75百分位数）表示。在所有情况下，动脉闭塞压从运动前到运动后均升高（p<0.001），但在更高压力下进一步升高[例如，0%：36（30-42）mmHg，10%：39（34-44）mmHg，90%：46（41-52）mmHg]。对于RPE和不适感，所有组运动在不同条件下均存在显著差异（p<0.01），RPE评分[例如，最后一组运动时，0%：14.5（13，17），10%：13.5（12，17），90%：17（14.75，19）]和不适感[例如，最后一组运动时，0%：3.5（1.5，6.25），10%：3（1，6），90%：7（4.5，9）]在更高的限制压力下通常更大。尽管完成的运动总量较低，但在更高的限制压力下仍出现了所有这些差异。与较低的限制压力相比，施加更高的相对压力会导致最大的心血管反应、更高的感知评分以及运动总量的更大减少。因此，较低相对压力下的感知反应可能更具吸引力，并为个体提供更安全、更可耐受的刺激。
