Physical Performance & Sports Research Center, Department of Sports and Computers Sciences, Universidad Pablo de Olavide, Seville, Spain.
NeuroMuscular Research Center, Faculty of Sport and Health Sciences, University of Jyväskylä, Finland.
Int J Sports Med. 2020 Dec;41(14):1047-1055. doi: 10.1055/a-1171-2287. Epub 2020 Jul 20.
This study aimed to examine the validity of using bar velocity to estimate relative load in squat and bench-press exercises for both young men and women. Twenty-five men and 25 women performed a progressive loading test up to 1-RM in the squat and bench-press exercises, which were repeated after 2-weeks. Relationships between mean propulsive velocity and%1-RM were analysed. A second-order polynomial equation for predicting the corresponding velocity of each percentage of 1-RM was developed for men (validation). This equation was then applied in women (cross-validation). Moreover, a specific equation for women was developed (validation) and was also applied in a sub-sample of women (cross-validation). Close relationships (R: 0.91-0.95) between bar velocity and relative load were observed in both sexes for squat and bench press. Men's equation applied to women showed a high level of agreement, although lower bias and higher level of agreement was observed when a sex-specific equation was applied in women, both validation and cross-validation samples. In conclusion, lifting velocity can be used to accurately prescribe the relative load regardless of sex in both upper-body and lower-body exercises, although when estimating load from velocity measures it will be necessary to use the sex-specific equation for each exercise.
本研究旨在检验使用杠铃速度来估计深蹲和卧推练习中相对负荷的有效性，适用于年轻男性和女性。25 名男性和 25 名女性进行了渐进式加载测试，直至达到 1-RM 的深蹲和卧推练习，2 周后重复进行。分析了平均推进速度与 1-RM 的关系。为男性（验证）制定了预测 1-RM 每个百分比相应速度的二阶多项式方程。然后将该方程应用于女性（交叉验证）。此外，还为女性制定了特定的方程（验证），并将其应用于女性的子样本中（交叉验证）。在深蹲和卧推练习中，两性的杠铃速度与相对负荷之间均存在密切关系（R：0.91-0.95）。男性的方程应用于女性时，虽然在验证和交叉验证样本中，应用特定于性别的方程时，偏差较低且一致性较高，但具有较高的一致性。总之，无论在上下身练习中，举重速度都可以用来准确规定相对负荷，尽管从速度测量中估计负荷时，有必要为每个练习使用特定于性别的方程。
