18S ストリングス・テンションの異なるラケットでテニスボールを打撃したときのプレイヤ上肢系衝撃振動の測定 : フォアハンド・グランドストロークにおける手首部およびサービスにおける肘部の加速度(スポーツ工学シンポジウム2001)

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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 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. However, there are few literatures with the experiments at the actual impact velocities. This paper investigates the effect of the string tensions on the impact shock vibrations of the arm of a tennis player. In the forehand stroke test, accelerations at the player's wrist joint and the racket handle were measured. In the service stroke test, accelerations at the player's elbow joint and the racket handle were measured. The results showed that the waveforms of the loosely strung racket and tightly strung racket are similar and there is no big difference when a male tournament player hits flat forehand drive. With the measured accelerations at the player's elbow joint and the racket handle when a male tournament player hits service at near the center of the racket face, the waveforms of the loosely strung racket and tightly strung racket were also similar and there is no big difference despite of the difference of 20 Ibs. Accordingly, it might be not correct that the looser strings are effective for the Tennis Elbow.
社団法人日本機械学会の論文
2001-11-07

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