Kurobe Yasushi, Momose Kimito
Department of Rehabilitation, Fujimi Kogen Medical Center, Japan.
Department of Health Sciences, Graduate School of Medicine, Shinshu University, Japan.
J Phys Ther Sci. 2023 Mar;35(3):247-251. doi: 10.1589/jpts.35.247. Epub 2023 Mar 1.
[Purpose] This study aimed to determine the concurrent validity of using force at a velocity of 0 m/s when estimating the one-repetition maximum leg press and develop and assess the accuracy of an equation to estimate the one-repetition maximum value. [Participants and Methods] Ten untrained healthy females participated. We directly measured the one-repetition maximum during the one leg press exercise and developed the individual force-velocity relationship using the trial with the highest mean propulsive velocity at 20% and 70% of the one-repetition maximum. We then used the force at a velocity of 0 m/s to estimate the measured one-repetition maximum. [Results] The force at a velocity of 0 m/s was strongly correlated with the measured one-repetition maximum. A simple linear regression analysis revealed a significant estimated regression equation. The multiple coefficient of the determination of this equation was 0.77, while the standard error of the estimate of the equation was 12.5 kg. [Conclusion] The estimation method based on the force-velocity relationship was highly valid and accurate at estimating the one-repetition maximum for the one leg press exercise. The method provides valuable information to instruct untrained participants at the start of resistance training programs.
[目的]本研究旨在确定在估计单腿腿举一次重复最大值时使用0 m/s速度下的力的同时效度，并开发和评估一个估计一次重复最大值的方程的准确性。[参与者与方法]十名未经训练的健康女性参与。我们在单腿腿举运动期间直接测量一次重复最大值，并使用在一次重复最大值的20%和70%时具有最高平均推进速度的试验来建立个体力-速度关系。然后我们使用0 m/s速度下的力来估计测量的一次重复最大值。[结果]0 m/s速度下的力与测量的一次重复最大值高度相关。简单线性回归分析揭示了一个显著的估计回归方程。该方程的多重决定系数为0.77，而方程的估计标准误差为12.5 kg。[结论]基于力-速度关系的估计方法在估计单腿腿举运动的一次重复最大值时具有高度的有效性和准确性。该方法为在阻力训练计划开始时指导未经训练的参与者提供了有价值的信息。
