其他摘要：The purpose of this study was to analyze the motion pattern for the hip, knee and ankle joint during running at various speeds. The electrogoniometer was used to obtain continuous recordings of the rotation of the joint and the pressure transducer fixed on the inside of the shoes was used to obtain the reference points for running. Those points were the instant when the heel made contact with the ground, the instant the toe exerted the maximum force against the ground and the instant the the broke the contact with the ground. Three subjects (who were an excellent sprinter, a good runner and an untrained of ordinary adult) were employed in this study. They run at various speeds on the motordriven treadmill, the speed of which was from 150m/min to 500m/min. Results obtained in the study were as follows; 1.The amplitude of the rotation of the hip and the knee joint tended to increase according to the increase of running speed. The increasing rate of the amplitude was larger for the trained subject than for the untrained. 2.When the trained subject striked his foot on the ground, the swing leg was carried more nearly towards the support leg even at lower speed of running. On the contrary, the untrained subject remained his swing leg behind the body at the same instant. 3. At the instant when the toe exerted the maximum force against the ground, the trained subject carried his knee joint of the swing leg upward in front of mid body. But the untrained subject kept his swing leg near the support leg.
