握力測定姿勢・肢位の違いによる握力値と再現性の検討

Reproducibility of Grip Strength in Different Posture and Elbow Position

　目的：立位・坐位，肘伸展・肘90°屈曲における握力値と再現性について検討した．方法：成人健常男女各20名を対象とし，Smedley式握力計を用い，立位肘伸展，立位肘90°屈曲，坐位肘伸展，坐位肘90°屈曲の姿勢で，各3回握力値を計測した．結果：女性非利き手を除き，握力値は男女とも立位肘伸展位が坐位肘90°屈曲より高値を示し，再現性は，異なった姿勢・肢位での測定より，同一姿勢・肢位で高値であった．結語：再現性の高めるためには同一姿勢，肢位での握力測定が必要と考える．

　Purpose：Because of the difficulty in verifying the reproducibility of grip strength, consensus has not been reached regarding its measurement. We determined the effect of posture and elbow position on grip strength and its reproducibility. Methods：40 healthy subjects were evaluated three times using a Smedley dynamometer in four situations；standing with fully extended elbow, standing with 90° flexed elbow, sitting with fully extended elbow, and sitting with 90° flexed elbow. Results：Maximum grip strength was obtained standing with fully extended elbow and minimum sitting with 90° flexed elbow except for nondominant women, in whom reproducibility was high in all four situations. Conclusions：Although different posture and elbow position affected grip strength, high reproducibility was maintained. Those requiring continuous measurement should thus be measured routinely with consistent posture and elbow position.