Relationship between the Speed of a Tennis Serve and Muscle Power in University Tennis Players
朝倉, 優子 出村, 慎一 ,
藤谷, かおる ,
6 , 2016-09-12 , 金沢大学大学院人間社会環境研究科 = Graduate School of Human and Socio-Enviromental Studies Kanazawa University
The tennis serve comprises two serves, the first of which is important for an attack. This study aimed to examine the relationship between the speed of a tennis serve and upper-limb and full-body muscle power. The subjects of this study were 26 male university tennis players ( career: 4.2 ± 2.0 years, age: 20.3 ± 1.2 years). Grip power and elbow flexion power were selected as indicators of upper-limb muscle power, and vertical jump power as the indicator of whole-body power. The latter was calculated based on the formula by Sayers et al. ( 1999), calculated from the height of a vertical jump. The relationship between variables was examined by Pearson's correlation coefficient. Serve speed showed a moderate but significant correlation with vertical jump power (r = 0.68), but not with grip and elbow flexion powers, which are local movements of the upper limb. However, the vertical jump is a movement of the whole body, and the kinematic chain from the lower to upper limbs plays an important role in its execution. To acquire a fast serve speed, it is necessary to apply the power of the whole body to the ball through the racket. Hence, we can infer that service speed and vertical jump power are significantly correlated. In conclusion, whole-body power contributes more to serve speed in tennis than the upper-limb powers examined in this study.