School of Life Sciences, Coventry University, Coventry, United Kingdom ; and.
Department of Physical Education and Sports Sciences, University of Limerick, Limerick, Ireland.
J Strength Cond Res. 2021 Jun 1;35(6):1636-1641. doi: 10.1519/JSC.0000000000002942.
Lawson, C, Mundy, P, Lyons, M, and Duncan, MJ. Optimal loading for force production in the straight bar deadlift: Force-time characteristics in strength-trained adults. J Strength Cond Res 35(6): 1636-1641, 2021-This study sought to identify whether there is an optimum load in relation to peak force development and rate of force development (RFD) in the straight bar deadlift and to examine whether baseline strength levels influence this optimum load. Twelve strength-trained men (mean age ± SD; 25.1 ± 5.4 years) performed 3 deadlift repetitions at loads of 10% intervals of 20-90% of their predetermined individual 1 repetition maximum (1RM). Peak vertical force (PFz) and RFD were determined from each repetition. The repetition at each percentage of 1RM that produced the greatest PFz was used for analysis. All data were collected on an AMTI force platform. Repeated-measures analysis of variance indicated significant differences in PFz across loads of 20-90% 1RM (p = 0.001) with a linear increase in PFz with increasing % of 1RM. The highest PFz occurred at 90% of 1RM. For RFD, there was a significant main effect for load (p = 0.018) where instantaneous RFD was significantly higher at 80 and 90% 1RM compared with 20% 1RM. When analyses were re-run using baseline strength as a covariate, the results did not change, indicating that baseline strength did not influence the PFz or RFD output. These results suggest that there is no significant difference in RFD between adjacent loads, but that peak force production was greatest at 90% 1RM in the straight bar deadlift.
劳森、芒迪、莱昂斯和邓肯。在直杠硬拉中产生力量的最佳负荷：力量训练成年人的力-时特征。J 力量与调理研究 35(6)：1636-1641，2021-本研究旨在确定在直杠硬拉中与峰值力发展和力发展速率（RFD）相关的最佳负荷，以及检查基础力量水平是否会影响这个最佳负荷。12 名力量训练男性（平均年龄±标准差；25.1±5.4 岁）以 20-90%个人 1 次最大重复次数（1RM）的 10%间隔重复 3 次硬拉。从每次重复中确定垂直峰值力（PFz）和 RFD。使用分析的每个 1RM 百分比重复产生最大 PFz 的重复。所有数据均在 AMTI 力平台上收集。重复测量方差分析表明，在 20-90%1RM 的负荷下，PFz 存在显著差异（p=0.001），随着 1RM 的百分比增加，PFz 呈线性增加。最高 PFz 发生在 1RM 的 90%。对于 RFD，负荷有显著的主效应（p=0.018），80%和 90%1RM 的瞬时 RFD 明显高于 20%1RM。当使用基线力量作为协变量重新运行分析时，结果没有改变，表明基线力量不会影响 PFz 或 RFD 的输出。这些结果表明，相邻负荷之间的 RFD 没有显著差异，但在直杠硬拉中，峰值力产生最大在 1RM 的 90%。
