B15 やり投におけるやり加速メカニズムに関する動力学的分析 : 受動的関節トルクの機能とその発生要因(陸上競技)

概要

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The purpose of this study was to clarify the function and origin of passive components of shoulder joint torque in javelin throwing. We defined internal-external rotation and horizontal abduction-adduction torques of the shoulder joint in the phase of negative torque power as passive components of joint torque. In order to consider function and origin of the passive components of joint torque, we calculated dynamical contributions of joint torques to javelin speed, angular velocity of horizontal abduction-adduction and internal-external rotation of shoulder joint, and angular acceleration of rotation of lower torso. From the results, we clarified the following facts as: 1) Passive component of internal rotation torque of the shoulder joint accelerate javelin, 2) Passive component of internal rotation torque of the shoulder joint was mainly caused by passive component of horizontal abduction-adduction torque of the shoulder joint, 3) Passive component of horizontal abduction-adduction torque of the shoulder joint was caused by rotational torque of torso, and 4) Rotational torque of torso was derived by joint torques of left hip, right knee, and left knee.
2008-11-05