テニスラケットの科学(75)　 腕系の障害、ラケットのリコール問題、米国消費者製品安全委員会(4)

REMEDIES（改善法）
MINIMUM SAFETY CHARACTERISTICS OF RACKETS

“In, “Prediction of Impact Shock Vibrations at Tennis Player’s Wrist Joint: Comparison between Conventional Weight Racket and Light Weight Racket with Super Large Head Size” in the Journal of System Design and Dynamics, the authors concluded:
“The result showed that the shock vibration of the super-light weight balanced racket with super-large sized head is much larger than that of the conventional weight balanced type racket.”*
（超大型ヘッド従来重量型バランスのラケットに比べて、超大型ヘッド軽量型バランスのテニスラケットは、ラケット・ハンドルの握りの位置および手首関節の衝撃振動が著しく大きい。）

* Yoshihiko KAWAZOE et al., Prediction of Impact Shock Vibrations at Tennis Player’s Wrist Joint: Comparison between Conventional Weight Racket and Light Weight Racket with Super Large Head Size, Journal of System Design and Dynamics, Vol. 4 (2010), No. 2, pp. 331-347.

1-画像：Federal Consumer Safety Product Commission Brief on Tennis Arm Injuries Epidemic”, U.S. Consumer Product Safety Commission , (2010), pp. 1- 12.より抜粋