Research On The Change Characteristic Of The Angle And Angular Velocity Of The Main Joints During One-leg Supporting Phase Of The Rotational Shot Put Technique To Zhang Jun

On the kinematics, the research used the multiple regression to study the angle and angular velocity of joints during one-leg supporting phase of the rotational shot put technique with the elite shot-putter, ZhangJun as the research subject. This research selected the main and insignificant indicators of angle and angular velocity of joints, and analyzed the change characteristic of angle and angular velocity of the main joints during one-leg supporting phase of the rotational shot put technique from the view of Sports Biomechanics and Sports Theory, which is helpful to analyze the ZhangJun's technical movement during one-leg supporting phase, and improve the skill with the improvement of special athletic performance. Meanwhile, it has important implications not only for enriching the theoretical research of rotational shot put technique, but also for promoting the theoretical research of Sports Training Theory and Sports Biomechanics. The research results showed that,1. During the one-leg supporting phase of the rotational shot put technique, we have found that there was a significant correlation between the movement performance and six indicators of the left shoulder joint angle, the left hip joint, the right knee joint angle, the left shoulder joint angular velocity,the left hip joint angular velocity, and the left knee joint angular velocity.2. During the one-leg supporting phase of the rotational shot put technique, the changing trend of ZhangJun's right shoulder joint angle is reduce first, then increase; the changing trend of the left hip joint angle and the right knee joint's angle are increase first, then reduce.3. During the one-leg supporting phase of the rotational shot put technique, the variation law of the left shoulder's joint angular velocity is accelerated adduction～decelerated adduction-accelerated abduction-decelerated abduction～accelerated abduction. The change rule of the left hip joint's angular velocity is accelerated stretch-decelerated stretch-accelerated bend-decelerated bend～accelerated stretch decelerated stretch～accelerated bend～decelerated bend. The change rule of the left knee's joint angular velocity is decelerated stretch～accelerated stretch～decelerated stretch～accelerated bend.