CHANGE IN KINETICS OF THROWING ARM JOINTS IN ELEMENTARY SCHOOL CHILDREN DUE TO TRAINING OF A DISTANCE THROW

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The purpose of this study was to investigate effects of training with a standard motion model on the kinetics of throwing arm joints in elementary school children. Thirty-two children from sixth grade were participated in three sessions: pre- and post-training videotaping and technique training. Their throwing motions were videotaped with two high-speed cameras and analysed three-dimensionally. Through the training with the use of standard motion model as a reference, throwing distance and ball velocity significantly improved. Joint force, joint torque and mechanical work in throwing arm joints increased at the post-training. The results indicated that the use of standard motion model was useful for the improvement in throwing distance and joint kinetics of throwing arm.