Effects of String Stiffness on Muscle Fatigue After a Simulated Tennis Match.
| Autor: | Bernard Fabre, Jean, Martin, Vincent, Borelli, Gil, Theurel, Jean, Grélot, Laurent |
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| Předmět: |
MUSCLE physiology
ANALYSIS of variance BODY weight STATISTICAL correlation ELECTROMYOGRAPHY FATIGUE (Physiology) FOREARM GRIP strength MUSCLE diseases RESEARCH funding STATISTICS STATURE T-test (Statistics) TENNIS DATA analysis REPEATED measures design DATA analysis software DESCRIPTIVE statistics DISEASE complications |
| Zdroj: | Journal of Applied Biomechanics; Jun2014, Vol. 30 Issue 3, p401-406, 6p, 1 Color Photograph, 1 Black and White Photograph, 2 Charts |
| Abstrakt: | We tested the influence of string stiffness on the occurrence of forearm muscles fatigue during a tennis match. Sixteen tennis players performed two prolonged simulated tennis matches with low-stiffness or high-stiffness string. Before and immediately after exercise, muscle fatigability was evaluated on the forearm muscles during a maximal intermittent gripping task. Groundstroke ball speeds and the profile of acceleration of the racquet frame at collision were recorded during each match. The peak-to-peak amplitude of acceleration and the resonant frequency of the frame were significantly greater with high- (5060 ± 1892 m/s2 and 204 ± 29 Hz, respectively) than with low-stiffness string (4704 ± 1671 m/s2 and 191 ± 16 Hz, respectively). The maximal and the averaged gripping forces developed during the gripping task were significantly reduced after the tennis match with high- (- 15 ± 14 %, and - 22 ± 14 %, respectively), but not with low-stiffness string. The decrease of ball speed during the simulated matches tended to be greater with high- than with low-stiffness string (p = .06). Hence, playing tennis with high-stiffness string promotes forearm muscle fatigue development, which could partly contribute to the groundstroke ball speed decrement during the game. [ABSTRACT FROM AUTHOR] |
| Databáze: | Complementary Index |
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