Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, 18010 Granada, Spain.
Sport Performance Research Institute New Zealand (SPRINZ), Auckland University of Technology, Auckland 1142, New Zealand.
Int J Environ Res Public Health. 2021 Jan 25;18(3):1057. doi: 10.3390/ijerph18031057.
This study aimed (I) to compare the number of repetitions that can be completed to failure (XRM) and before reaching a 15%, 30%, or 45% velocity loss threshold (XVLT) in the bench press exercise performed using different grip widths, and (II) to examine the inter-individual variability in the percentage of completed repetitions with respect to the XRM when the set volume is prescribed based on a fixed number of repetitions (FNR) and several velocity loss thresholds (VLT). Nineteen men performed four separate sessions in a random order where there was a single set of repetitions completed to failure against 75% of the one-repetition maximum during the Smith machine bench press exercise using a narrow, medium, wide, or self-selected grip widths. The XRM ( = 0.545) and XVLTs ( ≥ 0.682) were not significantly affected by grip width. A high and comparable inter-individual variability in the percentage of completed repetitions with respect to the XRM was observed when using both an FNR (median CV = 24.3%) and VLTs (median CV = 23.5%). These results indicate that Smith machine bench press training volume is not influenced by the grip width and that VLTs do not allow a more homogeneous prescription of the set volume with respect to the XRM than the traditional FNR.
(I)比较在使用不同握距进行卧推练习时，达到失败次数 (XRM) 和达到 15%、30%或 45%速度损失阈值 (XVLT) 之前所能完成的重复次数；(II)当根据固定重复次数 (FNR) 和多个速度损失阈值 (VLT) 规定设定量时，检查相对于 XRM 的完成重复次数的个体间变异性。19 名男性以随机顺序进行了四次单独的测试，在史密斯机卧推练习中，使用窄、中、宽或自选握距，以 75%的 1 次重复最大力量完成 1 组至力竭。XRM（=0.545）和 XVLT（≥0.682）不受握距影响。当使用 FNR（中位数 CV = 24.3%）和 VLTs（中位数 CV = 23.5%）时，相对于 XRM 的完成重复次数的个体间变异性较高且相当。这些结果表明，史密斯机卧推训练量不受握距影响，与传统的 FNR 相比，VLT 并不能更均匀地规定相对于 XRM 的设定量。
