Tredinnick T J, Duncan P W
University Hospital-Milton S. Hershey Medical Center, Pennsylvania State University, Hershey 17033.
Phys Ther. 1988 May;68(5):656-9. doi: 10.1093/ptj/68.5.656.
The purpose of this study was to assess the reliability of a method for testing peak torque and work output of the knee extensor muscle during concentric and eccentric loading at three velocities of exercise (60 degrees, 120 degrees, and 180 degrees/sec). Fourteen healthy men (23-32 years of age) performed exercises of the quadriceps femoris muscles during concentric and eccentric loading, with a five-second pause between each contraction. Three different tests were performed on different occasions. The first exercise session was a practice session, and the next two sessions were established to collect data in a test-retest format. Peak torque and work were measured for the two testing sessions. The results of this study demonstrated that with a very specific protocol, the reliability of concentric peak torque and work measurements was excellent at 60 degrees and 120 degrees/sec and good at 180 degrees/sec. In contrast, reliability of eccentric peak torque and work measurements was good at 120 degrees and 180 degrees/sec but low at 60 degrees/sec.
本研究的目的是评估一种用于测试在三种运动速度（60度、120度和180度/秒）下，股四头肌在向心和离心负荷时的峰值扭矩和功输出的方法的可靠性。14名健康男性（23 - 32岁）在向心和离心负荷期间进行股四头肌锻炼，每次收缩之间有5秒的停顿。在不同场合进行了三项不同的测试。第一次训练是一次练习，接下来的两次训练是以重测形式收集数据。测量了两次测试的峰值扭矩和功。本研究结果表明，采用非常特定的方案时，在60度/秒和120度/秒时，向心峰值扭矩和功测量的可靠性极佳，在180度/秒时良好。相比之下，离心峰值扭矩和功测量在120度/秒和180度/秒时可靠性良好，但在60度/秒时较低。
