School of Physical Education and Sports, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.
College of Physical Education and Sports, Federal University of Juiz de Fora, Minas Gerais, Brazil.
J Strength Cond Res. 2021 Nov 1;35(11):2993-2998. doi: 10.1519/JSC.0000000000003532.
da Silva Novaes, J, da Silva Telles, LG, Monteiro, ER, da Silva Araujo, G, Vingren, JL, Silva Panza, P, Reis, VM, Laterza, MC, and Vianna, JM. Ischemic preconditioning improves resistance training session performance. J Strength Cond Res 35(11): 2993-2998, 2021-The aim of this study was to investigate the acute effect of ischemic preconditioning (IPC) in a resistance exercise (RE) training session on the number of repetitions performed, total volume, and rating of perceived exertion in recreationally trained and normotensive men. Sixteen recreationally trained and normotensive men completed 3 RE sessions in a counterbalanced and randomized order: (a) IPC protocol using 220 mm Hg followed by RE (IPC), (b) IPC cuff control protocol with 20 mm Hg followed by RE (CUFF), and (c) no IPC (control) followed by RE (CON). RE was performed with 3 sets of each exercise (bench press, leg press, lateral pulldown, hack machine squat, shoulder press, and Smith back squat) until concentric muscular failure, at 80% of one repetition maximum, with 90 seconds of rest between sets and 2 minutes of rest between exercises. Ischemic preconditioning and CUFF consisted of 4 cycles of 5 minutes of occlusion/low pressure alternating with 5 minutes of no occlusion (0 mm Hg) using a pneumatic tourniquet applied around the subaxillary region of the upper arm. For each condition, the number of repetitions completed, total volume of work performed, and rating of perceived exertion were determined. No significant difference was found for rating of perceived exertion between any experimental protocol. Ischemic preconditioning significantly (p < 0.05) increased the number of repetitions across exercises. Consequently, total volume performed (sum of total number of repetitions x load for each exercise) was significantly higher in IPC (46,170 kg) compared with CON (34,069 kg) and CUFF (36,590 kg) across all exercises. This work may have important implications for athletic populations because it demonstrates increase in muscle performance outcomes during a single RE session. Therefore, performing IPC before RE could be an important exercise prescription recommendation to increase maximum repetition performance and total volume of work performed and thus potentially increase desired training adaptations (i.e., strength and hypertrophy).
达席尔瓦·诺瓦伊斯、J、达席尔瓦·特列斯、LG、蒙泰罗、ER、达席尔瓦·阿劳若、G、文格林、JL、席尔瓦·潘萨、P、雷伊斯、VM、拉泰尔扎、MC 和维亚纳、JM。缺血预处理可提高抗阻训练效果。《力量与调节研究杂志》35（11）：2993-2998，2021 年。本研究旨在探讨缺血预处理（IPC）对单次抗阻训练中重复次数、总工作量和主观感觉用力程度的急性影响，研究对象为有规律进行抗阻训练的、血压正常的男性业余运动员。16 名有规律进行抗阻训练的、血压正常的男性志愿者以平衡和随机的顺序完成了 3 次抗阻训练：（a）IPC 方案使用 220mmHg 随后进行抗阻训练（IPC）；（b）IPC 袖带控制方案使用 20mmHg 随后进行抗阻训练（CUFF）；（c）无 IPC（对照）随后进行抗阻训练（CON）。IPC 是使用气动止血带在腋窝区施加 220mmHg 压力，每 5 分钟交替进行一次，每次 5 分钟。每个练习使用 3 组，每组 80%的 1 次重复最大强度，组间休息 90 秒，练习间休息 2 分钟。抗阻训练包括 4 个循环，每个循环 5 分钟闭塞/低压和 5 分钟非闭塞（0mmHg）。每个条件下，完成的重复次数、总工作量和主观感觉用力程度都被确定。在任何实验方案中，主观感觉用力程度都没有显著差异。IPC 显著（p<0.05）增加了所有练习的重复次数。因此，IPC 时（46170kg）总工作量（每项练习的总重复次数乘以负荷的总和）明显高于 CON（34069kg）和 CUFF（36590kg）。这一工作可能对运动员群体具有重要意义，因为它表明在单次抗阻训练中，肌肉表现结果得到了提高。因此，在进行抗阻训练之前进行 IPC 可能是一种重要的运动处方推荐，可增加最大重复次数和总工作量，从而可能增加所需的训练适应性（即力量和肥大）。
