Applied Musculoskeletal and Human Physiology Laboratory, Department of Health and Human Performance, Oklahoma State University, Stillwater, OK, USA.
J Electromyogr Kinesiol. 2012 Dec;22(6):893-900. doi: 10.1016/j.jelekin.2012.05.008. Epub 2012 Jul 4.
The purpose of this study was to investigate the consistency of commonly reported rapid force characteristics utilizing both automated and manual muscle contraction onset detection methods. Twenty-four healthy volunteers performed isometric strength testing of the plantar flexor muscle group on two nonconsecutive days. Test-retest reliability was evaluated using intraclass correlation coefficients (ICCs), standard errors of measurement (SEM), and the SEM as a percentage of the mean (SEM%) for rate of force development (RFD), relative RFD, contractile impulse, and absolute force-time values at various epoch durations using automated and manual onset detection methods. For all rapid force variables, ICC and SEM% values ranged from 0.52 to 0.96 and 7.56% to 37.56%, respectively. For the majority of these variables (20 of 23), the automated onset detection method resulted in higher ICC and lower SEM% values compared to the manual onset detection method. Regardless of onset detection methodology, the consistency of relative RFD values declined following 50% of MVC. Collectively, these findings indicated that commonly evaluated rapid muscle force variables demonstrated acceptable relative and absolute consistency values. However, these values were generally superior for the automated onset detection methodology. Additionally, the consistency of relative RFD values declines following 50% MVC and therefore should be evaluated with caution.
本研究旨在探讨利用自动和手动肌肉收缩起始检测方法报告的常见快速力特征的一致性。24 名健康志愿者在两天内进行了跖屈肌群的等长力量测试。使用自动和手动起始检测方法，通过组内相关系数（ICC）、测量标准误差（SEM）和 SEM 占平均值的百分比（SEM%），评估了在不同时程的力发展速率（RFD）、相对 RFD、收缩冲量和绝对力-时间值的测试-再测试可靠性。对于所有快速力变量，ICC 和 SEM% 值的范围分别为 0.52 至 0.96 和 7.56% 至 37.56%。对于这些变量中的大多数（23 个中的 20 个），与手动起始检测方法相比，自动起始检测方法产生了更高的 ICC 和更低的 SEM% 值。无论起始检测方法如何，相对 RFD 值的一致性在达到 MVC 的 50%后下降。总的来说，这些发现表明，常见评估的快速肌肉力变量表现出可接受的相对和绝对一致性值。然而，这些值通常优于自动起始检测方法。此外，相对 RFD 值的一致性在达到 MVC 的 50%后下降，因此应谨慎评估。
