Costa Bruna, Ferreira Danielly M, Gantois Petrus, de Lima-Júnior Dalton, Kassiano Witalo, Cyrino Edilson S, Fortes Leonardo S
Metabolism, Nutrition, and Exercise Laboratory. Londrina State University. Londrina, PR, Brazil.
Federal University of Pernambuco, Department of Physical Education. Recife, PE, Brazil.
J Hum Kinet. 2021 Mar 31;78:209-217. doi: 10.2478/hukin-2021-0049. eCollection 2021 Mar.
Performing repetitions to failure (RF) is a strategy that might acutely reduce neuromuscular performance, as well as increase the rating of perceived exertion (RPE) and the internal training load (ITL) during and after a resistance training (RT) session. Thus, this study aimed to analyze the acute effects of RF or repetitions not to failure (RNF) on countermovement jump (CMJ) performance and the ITL in trained male adults. Eleven men performed two experimental protocols in randomized order (RF vs. RNF). Under the RF condition, participants performed three sets of the leg extension exercise using 100% of the 10RM load and rest intervals of 180-s between sets. Under the RNF condition, participants were submitted to six sets of five repetitions with the same intensity and an 80-s rest interval between sets in the same exercise. The CMJ test was analyzed before and following (15-s and 30-min, respectively) each experimental session. The ITL was evaluated by multiplying the RPE and the total session time, 30-min after the protocol. No main effect or interaction time vs. condition was found for CMJ performance (p > 0.05). In contrast, the ITL showed higher values under the RF condition (p = 0.003). Therefore, even though RF-induced a greater ITL, our results suggest that adopting this strategy in one single-joint exercise for the lower limbs does not seem sufficient to reduce CMJ height.
进行至力竭重复训练（RF）是一种可能会在抗阻训练（RT）期间及之后急剧降低神经肌肉性能、提高主观用力程度评级（RPE）和内部训练负荷（ITL）的策略。因此，本研究旨在分析RF或非至力竭重复训练（RNF）对训练有素的成年男性反向运动跳跃（CMJ）性能和ITL的急性影响。11名男性按照随机顺序进行了两种实验方案（RF与RNF）。在RF条件下，参与者使用10RM负荷的100%进行三组腿部伸展运动，组间休息180秒。在RNF条件下，参与者以相同强度进行六组，每组五次重复，同一练习组间休息80秒。在每个实验环节之前和之后（分别为15秒和30分钟）分析CMJ测试。在方案结束30分钟后，通过将RPE与总训练时间相乘来评估ITL。未发现CMJ性能在时间与条件之间存在主效应或交互作用（p>0.05）。相比之下，RF条件下的ITL值更高（p = 0.003）。因此，尽管RF会导致更高的ITL，但我们的结果表明，在针对下肢的单关节运动中采用这种策略似乎不足以降低CMJ高度。
