19S テニス・プレイヤ手首部の衝撃振動におよぼすストリングス・テンションの影響 : フォアハンド・グランドストロークにおける手首部加速度の予測とメカニズム(スポーツ工学シンポジウム2001)

概要

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At the current stage, the terms used in describing the performance of a tennis racket are still based on the feeling of an experienced tester or a player. Accordingly, there are many unknowns in the relationship between the performance estimated by a player and the physical properties of a tennis racket It is often said recently that lower tensions increase the dwell time of the ball on the strings, offer less impact on the arm, and is better for the arm. Strangely many people thought just the opposite in the past. However, there have been few experimental studies with the actual impact velocities. In our recent measurements with the accelerations at the player's wrist joint and the racket handle during the actual forehand stroke and with the ones at the player's elbow joint and the racket handle during the actual service stroke, there was no big difference between the loosely strung racket and the tightly strung racket This means it might be not correct that the looser strings are effective for the tennis elbow. This paper has investigated why the loosely strung racket is ineffective for the tennis elbow. It has made clear the mechanism of the effect of the string tensions on the impact shock vibrations at the grip and the arm of a tennis player on the basis of the impact analysis with the loosely strung racket comparing to the tightly strung racket during the forehand stroke.
2001-11-07