골볼 스텝별 릴리스 시 볼의 속도에 대한상체분절의 기여도

Abstract

This study was conducted in order to offer basic data necessary for coaching skills by analyzing contribution of upper limb segments on the throw movement in goalball. The experimental group was set to 3 national male strikers for goal-ball. The control group was selected 3 persons who began goa-ball as the life-time sports and whose physical conditions are similar to those of the experimental group. The throw movement by step was shot with 60Fields/sec by using 6 cameras. The video data and the Raw data were calculated by using Kwon3D XP, and were analyzed by using Excel. The obtained conclusions are as follows. First, the contribution of each segment to speed of ball given release in the experimental group was indicated to be trunk rotation, upper-arm rotation and whole-body movement, or trunk movement in order. Second, as for the experimental group, as step increases, the speed in ball sharply grows by the whole-body and trunk movement, thereby having been judged to properly use the inertia, which is created due to a rise in step, and the weight movement, which occurs when swinging ball. Third, as for the experimental group, the contribution in the trunk rotation and the upper-arm rotation was indicated to be high in all the throw types without a big change. However, the control group was indicated to be high in the contribution of the trunk rotation and to be low in the contribution of the upper-arm rotation, and showed big difference depending on throw type, thereby having judged to be not smooth in transition of movement domino principle or motion quantity. Accordingly, when coaching the goal-ball throw movement to a beginner, it is thought that there is necessity of guidance so that transition in efficient motion quantity can be attained by stably moving the center in the body and weight, and by maximizing the revolving power in the upper arm with the big back-swing movement.