Ingemann-Hansen T, Halkjaer-Kristensen J
Scand J Rehabil Med. 1979;11(2):85-9.
Isokinetic contraction were performed with the knee extensor muscles in 15 young male soccer players. The measurements were obtained by a modified isokinetic device (Orthotron). In the range of motion the angular velocity was constant from 90 degrees to 20 degrees of knee flexion. The angular velocity could be varied from 30 to 360 degrees/s. The overall variation of the pre-set speed and the peak torque, as estimated from duplicate trials through the whole velocity range, averaged 4% and 5%, respectively. The peak torque decreased linearly with increasing angular velocity in a semilogarithmic scale. An estimate of the peak torque-velocity relationship in an experimental subject was obtained from the slope and the fibre composition in the lateral portion of the quandriceps muscle in this group of subjects especially trained in fast movements. It was concluded that the present applied isokinetic device gives the opportunities to measure force-velocity characteristics in the intact quadriceps muscle of man.
对15名年轻男性足球运动员的膝伸肌进行了等速收缩测试。测量是通过一种改良的等速装置（Orthotron）进行的。在运动范围内，膝关节从90度屈曲到20度时角速度保持恒定。角速度可在30至360度/秒之间变化。通过在整个速度范围内的重复试验估计，预设速度和峰值扭矩的总体变化分别平均为4%和5%。在半对数尺度上，峰值扭矩随角速度增加呈线性下降。从这组经过快速运动专门训练的受试者股四头肌外侧部分的斜率和纤维组成，获得了一名实验对象峰值扭矩-速度关系的估计值。得出的结论是，目前应用的等速装置为测量人体完整股四头肌的力-速度特性提供了机会。
