Stock Matt S, Luera Micheal J
Human Performance Laboratory, Department of Health, Exercise, and Sport Sciences, Texas Tech University, Lubbock, TX.
J Appl Biomech. 2014 Apr;30(2):322-5. doi: 10.1123/jab.2013-0191. Epub 2013 Sep 13.
The ability to examine force curves from multiple-joint assessments combines many of the benefits of dynamic constant external resistance exercise and isokinetic dynamometry. The purpose of this investigation was to examine test-retest reliability statistics for peak and mean force using the Exerbotics eSQ during maximal concentric and eccentric squats. Seventeen resistance-trained men (mean±SD age=21±2 years) visited the laboratory on two occasions. For each trial, the subjects performed two maximal concentric and eccentric squats, and the muscle actions with the highest force values were analyzed. There were no mean differences between the trials (P>.05), and the effect sizes were <0.12. When the entire force curve was examined, the intraclass correlation coefficients (model 2,1) and standard errors of measurement, respectively, were concentric peak force=0.743 (8.8%); concentric mean force=0.804 (6.0%); eccentric peak force=0.696 (10.6%); eccentric mean force=0.736 (9.6%). These findings indicated moderate-to-high reliability for the peak and mean force values obtained from the Exerbotics eSQ during maximal squat testing. The analysis of force curves from multiple-joint testing provides researchers and practitioners with a reliable means of assessing performance, especially during concentric muscle actions.
分析多关节评估中的力曲线的能力结合了动态恒定外部阻力训练和等速测力法的诸多优点。本研究的目的是使用Exerbotics eSQ评估最大向心和离心深蹲时峰值力和平均力的重测信度统计数据。17名经过阻力训练的男性（平均年龄±标准差=21±2岁）分两次到实验室。每次试验中，受试者进行两次最大向心和离心深蹲，并分析力值最高的肌肉动作。两次试验之间无均值差异（P>0.05），效应量<0.12。检查整个力曲线时，组内相关系数（模型2,1）和测量标准误差分别为：向心峰值力=0.743（8.8%）；向心平均力=0.804（6.0%）；离心峰值力=0.696（10.6%）；离心平均力=0.736（9.6%）。这些结果表明，在最大深蹲测试中，Exerbotics eSQ获得的峰值力和平均力值具有中等到高度的可靠性。多关节测试中的力曲线分析为研究人员和从业者提供了一种可靠的评估性能的方法，尤其是在向心肌肉动作期间。
