a Centro de Investigación en Rendimiento Físico y Deportivo , Universidad Pablo de Olavide , de Sevilla , España.
J Sports Sci. 2018 Dec;36(24):2856-2864. doi: 10.1080/02640414.2018.1480052. Epub 2018 May 30.
This study aimed to analyze the acute effect of inter-repetition rest (IRR) intervals on mechanical and metabolic response during four resistance exercise protocols (REPs). Thirty resistance-trained men were randomly assigned to: continuous repetitions (CR), 10 s (IRR10) or 20 s (IRR20) inter-repetition rest. The REPs consisted of 3 sets of 6, 5, 4 and 3 repetitions against 60, 70, 75 and 80% 1RM, respectively, in the full squat exercise. Muscle fatigue was assessed using: percentage of velocity loss over three sets, percentage of velocity loss against the ~1 m·s load (V1 m·s), and loss of countermovement jump (CMJ) height pre-post exercise. Blood lactate was measured before and after exercise. The percentage of velocity loss over three sets and lactate concentration were significantly lower (P < 0.05) for IRR groups compared to CR in all REPs. The CR group showed a significantly higher (P < 0.05) velocity loss against V1 m·s load and loss of CMJ height pre-post exercise than IRR groups in REP against 60% 1RM. In conclusion, both IRR groups produced a significant lower degree of fatigue compared to CR group. However, no significant differences were found in any measured variables between IRR configurations.
这项研究旨在分析在四种抗阻运动方案（REP）中，重复间歇休息（IRR）时间对机械和代谢反应的急性影响。30 名有抗阻训练经验的男性被随机分配到连续重复（CR）、10 秒（IRR10）或 20 秒（IRR20）IRR 组。REP 包括 3 组 6、5、4 和 3 次重复，分别针对 60%、70%、75%和 80%的 1RM 进行深蹲练习。通过以下指标评估肌肉疲劳：三组的速度损失百分比、针对约 1m·s 负荷的速度损失百分比（V1 m·s）和运动后反跳高度损失（CMJ）。运动前后测量血乳酸浓度。与 CR 相比，所有 REP 中，IRR 组的三组速度损失百分比和乳酸浓度均显著降低（P < 0.05）。与 IRR 组相比，在针对 60%1RM 的 REP 中，CR 组的 V1 m·s 负荷速度损失和运动前后 CMJ 高度损失明显更高（P < 0.05）。总之，与 CR 组相比，两组 IRR 组的疲劳程度显著降低。然而，在任何测量变量之间均未发现 IRR 配置之间存在显著差异。
