B6 バレーボール・スパイク動作時の手部速さ生成に関する順動力学的分析(運動のダイナミクス)

概要

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The purpose of this study was to clarify dynamical characteristics of spike motion by using the whole-body equation of motion. The human body was modeled as a system of sixteen rigid segments, and the equation of motion was derived in consideration of degree of freedom at each joint. By using the whole body equation of motion, we calculated dynamical contributions to hand speed. The contributions were consisted of three parts, such as; total joint torque term; motion dependent torque term; and gravitational term. The contribution of total joint torque was divided into contributions of joint axial torques. From the results, the total joint torque and motion dependent torque were mainly contributed to hand speed. And motion dependent torque was more contributed to increase the hand speed just before the impact. Joint axial torques which contributed to hand speed was likely to vary with the spike form of each subject. The contribution of motion dependent torque and amount of torso angular movement were significantly related. Therefore, torso angular movement is an important factor for generating high hand speed.
2007-11-13