[目的]本研究の目的は,静的ストレッチング(static stretching;SS)と動的ストレッチング(dynamic stretching;DS)後の関節可動域や筋出力に関して経時的変化を比較し,よりスポーツ活動前に適したストレッチング方法を明らかにすることとした。[対象]健康な成人女性18名とした。[方法]下腿三頭筋に対しSSおよびDSを行い,ストレッチング直前,直後,5分後,10分後に足関節背屈可動域と底屈筋力を測定した。[結果]関節可動域については,SSでは直後に上昇し10分間維持したのに対し,DS後は徐々に上昇し10分後にSS後と同程度に達した。筋力については,直後から10分後までSSよりもDSのほうが有意に高い値を示した。[結語]最大筋力を必要とするスポーツ活動の10分前にDSを行うことでより高いパフォーマンスを行うことができる可能性が示唆された。

[Purpose] The purpose of this study was to compare the effects of static stretching (SS) and dynamic stretching (DS) on temporal range of motion (ROM) and muscle strength and investigate better ways of stretching before some sporting activities. [Subjects] The Subjects were 18 healthy Japanese women. [Method] Subjects performed SS and DS of their triceps surae muscles. We measured ROM of ankle dorsiflexion and muscle strength of ankle plantar flexion of subjects before stretching, just after stretching, and 5 minutes and 10 minutes later. [Results] ROM of subjects who did SS increased just after stretching and this was maintained for 10 minutes. On the other hand, ROM of DS increased gradually and reached that of SS. Subjects who performed DS showed significantly greater ankle plantar flexion strength than subjects who did SS from just after the stretching to 10 minutes later. [Conclusion] These findings indicate that DS 10 minutes before performing some sporting activities in which peak muscle strength is necessary would enhance performance.