a Faculdade de Educação Física e Dança, Universidade Federal de Goiás, Goiânia 74690-900, Brasil.
b Centre for Health, Exercise, and Sport Science, School of Sport, Health and Social Sciences, Southampton Solent University, Southampton SO14 0YN, UK.
Appl Physiol Nutr Metab. 2018 Aug;43(8):833-837. doi: 10.1139/apnm-2018-0011. Epub 2018 Mar 21.
The purpose of the present study was to evaluate the changes in movement velocity during resistance training with different loads while the trainees attempted to move the load at a predetermined repetition duration. Twenty-one resistance-trained men (age: 25.7 ± 5 years; height: 177.0 ± 7.2 cm; mass: 85.4 ± 13.56 kg) volunteered to participate in the study. Participants performed 2 test sessions. The first to determine 1-repetition maximum (1RM) load, and the second to evaluate velocity loss during a set to failure performed at 75% and 50% of 1RM using a 2-s concentric and 2-s eccentric repetition duration, controlled by a mobile app metronome. When using 75% 1RM there was a significant loss of movement velocity between the antepenultimate and the penultimate repetition (5.33%, p < 0.05), as well as during the penultimate and the last (22.11%, p < 0.05). At 50% of 1RM the participants performed the set until momentary failure without significant velocity loss. Monitoring velocity loss during high-load resistance training through simple methods can be an important tool for standardize the intensity of effort employed during submaximal training. This can be useful in clinical conditions where maximum exertions are contraindicated or when specific logistics are lacking.
本研究的目的是评估在预定重复时间内尝试移动负荷时，不同负荷下的阻力训练中运动速度的变化。21 名受过阻力训练的男性（年龄：25.7±5 岁；身高：177.0±7.2cm；体重：85.4±13.56kg）自愿参加了这项研究。参与者进行了 2 次测试。第一次是确定 1 次重复最大值（1RM）负荷，第二次是在 75%和 50%的 1RM 下进行一组直至力竭，使用 2 秒向心和 2 秒离心重复时间，由移动应用节拍器控制，评估速度损失。当使用 75%的 1RM 时，在前倒数第二和倒数第二重复之间（5.33%，p<0.05）以及倒数第二和最后一次重复之间（22.11%，p<0.05）会出现明显的运动速度损失。在 50%的 1RM 下，参与者进行了一组直至瞬间失败，没有明显的速度损失。通过简单的方法监测高负荷阻力训练中的速度损失，可以成为标准化次最大训练中使用的努力强度的重要工具。在最大用力被禁止或特定物流缺乏的临床情况下，这可能是有用的。
