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不同頻率與振幅的全身振動對西式划船選手股四頭肌群表層肌電活性與運動表現的影響

Effects of Different Whole-Body Vibration Frequencies and Amplitudes on Surface Electromyography Activity of the Quadriceps and Performance in Rowers

Abstracts


Purpose: This study was to investigate the effects of different whole-body vibration (WBV) on the surface electromyography (EMG) activity of the quadriceps and performance during the 30-s Wingate test on a rowing ergometer. Methods: Fourteen elite male rowers (height, 175.6±4.7 cm; body mass, 76.4±5.2 kg) were assigned to four treatments by randomized and counter-balanced design, which including the high-frequency high-amplitude (HFHA; 30 Hz, 0.6 mm), low-frequency low-amplitude (LFLA; 15 Hz, 0.375 mm), high-frequency low-amplitude (HFLA; 30 Hz, 0.375 mm) and non-vibration exercise (CON; 0 Hz and 0 mm). Maximum voluntary contraction (MVC) of knee extensors was measured before the treatments, and then the athletes completed the 30-s Wingate test on the rowing ergometer immediately after the 10×1 min (1 min rest interval) vibration or no vibration stimulation. The EMG activities of the quadriceps were measured via the surface EMG and the power output of the screen on the rowing ergometer was recorded using a video camera. Results: No significant differences were identified in both peak power and average power output among the treatments (p>.05). There were no significant differences on the root-mean-square EMG (EMGrms) of the dominant leg among the treatments (p>.05). However, the HFLA had significantly higher EMGrms in the vastus lateralis of the non-dominant leg at the peak power output than the HFHA and CON treatments (p<.05). Moreover, the quotient of EMGrms/peak mechanical power had no significant difference among the treatments (p>.05). Conclusion: This study suggested that a single bout of WBV could not improve the anaerobic exercise performance, and the HFLA treatment might reduce the efficiency of recruited motor units on the non-dominant leg during the anaerobic power test in elite male rowers.

Parallel abstracts


Purpose: This study was to investigate the effects of different whole-body vibration (WBV) on the surface electromyography (EMG) activity of the quadriceps and performance during the 30-s Wingate test on a rowing ergometer. Methods: Fourteen elite male rowers (height, 175.6±4.7 cm; body mass, 76.4±5.2 kg) were assigned to four treatments by randomized and counter-balanced design, which including the high-frequency high-amplitude (HFHA; 30 Hz, 0.6 mm), low-frequency low-amplitude (LFLA; 15 Hz, 0.375 mm), high-frequency low-amplitude (HFLA; 30 Hz, 0.375 mm) and non-vibration exercise (CON; 0 Hz and 0 mm). Maximum voluntary contraction (MVC) of knee extensors was measured before the treatments, and then the athletes completed the 30-s Wingate test on the rowing ergometer immediately after the 10×1 min (1 min rest interval) vibration or no vibration stimulation. The EMG activities of the quadriceps were measured via the surface EMG and the power output of the screen on the rowing ergometer was recorded using a video camera. Results: No significant differences were identified in both peak power and average power output among the treatments (p>.05). There were no significant differences on the root-mean-square EMG (EMGrms) of the dominant leg among the treatments (p>.05). However, the HFLA had significantly higher EMGrms in the vastus lateralis of the non-dominant leg at the peak power output than the HFHA and CON treatments (p<.05). Moreover, the quotient of EMGrms/peak mechanical power had no significant difference among the treatments (p>.05). Conclusion: This study suggested that a single bout of WBV could not improve the anaerobic exercise performance, and the HFLA treatment might reduce the efficiency of recruited motor units on the non-dominant leg during the anaerobic power test in elite male rowers.

References


勞工安全衛生設施規則
周先樂(2004)。人體生理學。台北:藝軒出版社。
馮煒權(1994)。運動生物化學原理。北京:北京體育大學出版社。
B. Green's WWW user survey
Bongiovanni, L. G.,Hagbarth, K. E.,Stjernberg, L.(1990).Prolonged muscle vibration reducing motor output in maximal voluntary contraction in man.The Journal of Physiology.423(1),15-26.

Cited by


翁士航、高裕軒、柯耀雲、麥劉湘涵(2017)。振動訓練結合不穩定表面訓練對於體操選手下肢適能與運動表現之影響運動生理暨體能學報,(印製中),37-46。https://doi.org/10.6127/JEPF.2017.25.04

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