Ayala F, De Ste Croix M, Sainz de Baranda P, Santonja F
High Institute of Teaching (ISEN), University of Murcia, Murcia, Spain.
Clin Physiol Funct Imaging. 2013 Jan;33(1):45-54. doi: 10.1111/j.1475-097X.2012.01162.x. Epub 2012 Aug 8.
The main purpose of this study was to determine the absolute and relative reliability of isokinetic peak torque (PT), angle of peak torque (APT), average power (PW) and total work (TW) for knee flexion and extension during concentric and eccentric actions measured in a prone position at 60, 180 and 240° s(-1). A total of 50 recreational athletes completed the study. PT, APT, PW and TW for concentric and eccentric knee extension and flexion were recorded at three different angular velocities (60, 180 and 240° s(-1)) on three different occasions with a 72- to 96-h rest interval between consecutive testing sessions. Absolute reliability was examined through typical percentage error (CV(TE)), percentage change in the mean (ChM) and relative reliability with intraclass correlations (ICC(3,1)). For both the knee extensor and flexor muscle groups, all strength data (except APT during knee flexion movements) demonstrated moderate absolute reliability (ChM < 3%; ICCs > 0·70; and CV(TE) < 20%) independent of the knee movement (flexion and extension), type of muscle action (concentric and eccentric) and angular velocity (60, 180 and 240° s(-1)). Therefore, the current study suggests that the CV(TE) values reported for PT (8-20%), APT (8-18%) (only during knee extension movements), PW (14-20%) and TW (12-28%) may be acceptable to detect the large changes usually observed after rehabilitation programmes, but not acceptable to examine the effect of preventative training programmes in healthy individuals.
本研究的主要目的是确定在俯卧位以60、180和240°s⁻¹的角速度进行向心和离心运动时，膝关节屈伸的等速峰值扭矩（PT）、峰值扭矩角度（APT）、平均功率（PW）和总功（TW）的绝对可靠性和相对可靠性。共有50名休闲运动员完成了本研究。在三个不同的角速度（60、180和240°s⁻¹）下，分三次记录向心和离心膝关节屈伸的PT、APT、PW和TW，连续测试 sessions 之间的休息间隔为72至96小时。通过典型百分比误差（CV(TE)）、均值变化百分比（ChM）和组内相关系数（ICC(3,1)）来检验绝对可靠性和相对可靠性。对于膝关节伸肌和屈肌组，所有力量数据（膝关节屈曲运动时的APT除外）均显示出中等的绝对可靠性（ChM < 3%；ICCs > 0·70；CV(TE) < 20%），与膝关节运动（屈伸）、肌肉动作类型（向心和离心）和角速度（60、180和240°s⁻¹）无关。因此，本研究表明，报告的PT（8 - 20%）、APT（8 - 18%）（仅在膝关节伸展运动时）、PW（14 - 20%）和TW（12 - 二十八%）的CV(TE)值可能可用于检测康复计划后通常观察到的大变化，但不足以检验健康个体中预防性训练计划的效果。
