Dankel S J, Jessee M B, Buckner S L, Mouser J G, Mattocks K T, Loenneke J P
1 Department of Health, Exercise Science, and Recreation Management, Kevser Ermin Applied Physiology Laboratory, The University of Mississippi , University, MS, USA.
Physiol Int. 2017 Sep 1;104(3):247-257. doi: 10.1556/2060.104.2017.3.2.
The application of blood flow restriction during low-load resistance exercise has been shown to induce muscle growth with high or low restriction pressures, however, loads lower than 20% one-repetition maximum (1RM) remain unexplored. Fourteen trained individuals completed six elbow flexion protocols involving three different loads (10%, 15%, and 20% 1RM) each of which was performed with either a low (40% arterial occlusion) or high (80% arterial occlusion) pressure. Pre- and post-measurements of surface electromyography (sEMG), isometric torque, and muscle thickness were analyzed. An interaction was present for torque (p < 0.001) and muscle thickness (p < 0.001) illustrating that all increases in pressure and/or load resulted in a greater fatigue and muscle thickness. There was no interaction for sEMG (p = 0.832); however, there were main effects of condition (p = 0.002) and time (p = 0.019) illustrating greater sEMG in the 20% 1RM conditions. Higher blood flow restriction pressures may be more beneficial for muscle growth when very low loads are used.
低负荷抗阻运动期间应用血流限制已被证明，无论限制压力高低均可诱导肌肉生长，然而，低于1次重复最大值（1RM）20%的负荷仍未得到研究。14名受过训练的个体完成了6项屈肘方案，涉及三种不同负荷（1RM的10%、15%和20%），每种负荷均在低（40%动脉闭塞）或高（80%动脉闭塞）压力下进行。对表面肌电图（sEMG）、等长扭矩和肌肉厚度进行了测量前和测量后的分析。扭矩（p < 0.001）和肌肉厚度（p < 0.001）存在交互作用，表明压力和/或负荷的所有增加都会导致更大的疲劳和肌肉厚度。sEMG不存在交互作用（p = 0.832）；然而，条件（p = 0.002）和时间（p = 0.019）存在主效应，表明在1RM的20%条件下sEMG更大。当使用极低负荷时，更高的血流限制压力可能对肌肉生长更有益。
