Dose effect on intramuscular metabolic stress during low-intensity resistance exercise with blood flow restriction
Dose effect on intramuscular metabolic stress during low-intensity resistance exercise with blood flow restriction
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DOI：
10.1152/japplphysiol.00504.2009
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发表时间：
2010-06-01
影响因子：
3.3
通讯作者：
Tsutsui, Hiroyuki
中科院分区：
文献类型：
--
作者：
Suga, Tadashi;Okita, Koichi;Tsutsui, Hiroyuki
Suga T，Okita K，Morita N，Yokota T，Hirabayashi K，Horiuchi M，Takada S，Omokawa M，Kinukawa S，Ttsutsui H。血流限制的低强度阻力运动期间肌内代谢应激的剂量效应。 J Appl Physiol 108: 1563-1567, 2010。首次发表于 2010 年 4 月 1 日； doi:10.1152/japplphyol.00504.2009.-我们之前的研究报告称，通过将适度血流限制 (BFR) 与单次最大重复次数 (1 RM) 20% 的低强度阻力运动相结合所实现的骨骼肌代谢应激无法达到高强度阻力运动所达到的水平。由于先前的方案是当前此类方案的典型方案，因此我们在本研究中寻求通过检查运动强度和压力的剂量效应来优化 BFR 低强度阻力运动的运动方案。十二名健康受试者参与了这项研究。他们被要求在六种不同的条件下进行单侧跖屈 2 分钟（30 次重复/分钟）：两种不使用 BFR 的阻力练习（20% 1 RM 和 65% 1 RM），以及四种 BFR 方案。四种 BFR 方案包括三种不同的运动强度（20、30 和 40% 1 RM），中等压力 (MP)，使用 130% 收缩压（147 +/- 17 mmHg，平均值 +/- SD），以及 20% 1 RM，高压为 200 mmHg。通过P-31-磁共振波谱获得肌内代谢物和pH。观察到运动强度对肌内代谢物和 pH 值有显着的剂量影响 (P < 0.001)，但 BFR 压力则没有。结合 30% 1 RM 和 MP 的 BFR 方案与 65% 1 RM 的高强度负荷具有相似的结果。 BFR 运动期间的肌内代谢应激可能容易受到运动强度增加的影响。为了替代高强度阻力运动，BFR 方案可能需要 >= 30% 1 RM 的强度。
Suga T, Okita K, Morita N, Yokota T, Hirabayashi K, Horiuchi M, Takada S, Omokawa M, Kinugawa S, Tsutsui H. Dose effect on intramuscular metabolic stress during low-intensity resistance exercise with blood flow restriction. J Appl Physiol 108: 1563-1567, 2010. First published April 1, 2010; doi:10.1152/japplphysiol.00504.2009.-Our previous study reported that metabolic stress in skeletal muscle achieved by combining moderate blood flow restriction (BFR) with low-intensity resistance exercise at 20% of one repetition maximum (1 RM) could not reach the level achieved by high-intensity resistance exercise. Since the previous protocol is typical of current regimens of this type, we sought in this study to optimize the exercise protocol for low-intensity resistance exercise with BFR by examining the dose effects of exercise intensity and pressure. Twelve healthy subjects participated in this study. They were asked to perform unilateral plantar flexion for 2 min (30 repetitions/min) under six different conditions: two resistance exercises (20% 1 RM and 65% 1 RM) without BFR, and four BFR protocols. The four BFR protocols included three different exercise intensities (20, 30, and 40% 1 RM) with moderate pressure (MP) using 130% of systolic blood pressure (147 +/- 17 mmHg, mean +/- SD) and 20% 1 RM with high pressure at 200 mmHg. Intramuscular metabolites and pH were obtained by P-31-magnetic resonance spectroscopy. Significant dose effects on intramuscular metabolites and pH were observed for exercise intensity (P < 0.001) but not for BFR pressure. The BFR protocol combining 30% 1 RM with MP had similar results as the high-intensity load at 65% 1 RM. Intramuscular metabolic stress during BFR exercise might be susceptible to increasing exercise intensity. To replace high-intensity resistance exercise, the BFR protocol might require an intensity of >= 30% 1 RM.