Analysis of force- and power-velocity relationships in a specificity multi-joint movement

本研究的目的是检查等速平行下蹲的可靠性，以确定在相同受试者上重复测量是否产生可靠的结果。受试者以每秒30度、60度、90度、120度、150度和180度的角速度进行了六次下蹲测试。记录了每转峰值功率的绝对测量值。下蹲偏心阶段的组内相关系数(ICCs)在0.85~0.92之间，而同心阶段的ICCs除30度/S外，其余均在0.80以下。为了获得可靠的功率数据，在进行普通多关节力量测试的改良版时，似乎需要更多的熟悉。深蹲运动同心相变化导致的可靠性显著差异表明，测试的可靠性需要在修改后重新建立，然后才能用于评估受试者的力量表现。

The purpose of the present study was to examine the reliability of isokinetic parallel back squat to determine if repeated measures on the same subjects yielded reliable results. The subjects performed six squat tests at angular velocities of 30, 60, 90, 120, 150 and 180 degree per second. Absolute measures of peak power per revolution were recorded. The intraclass correlation coefficients (ICCs) for the eccentric phase of squat exercise ranged from 0.85-0.92 while for the concentric phase of squat exercise of ICCs values showed under 0.80 except at a speed of 30 degree/s. To obtain reliable power data, more familiarization seems to be needed when they perform modified versions of common multijoint strength tests. The marked differences in reliability resulting from variation in the concentric phase of squat exercise suggests that the reliability of a test needs to be reestablished when it is modified, before it is used to assess subject strength performance.