目的：探討全身振動後在划船測功儀上進行30秒溫蓋特測驗對股四頭肌表層肌電活性與運動表現之影響。方法：14名優秀男性划船選手（身高175.60±4.70公分；體重76.40±5.20公斤）以隨機和平衡次序設計進行四種處理，包括高頻率高振幅(HFHA; 30Hz, 0.6mm)、低頻率低振幅(LFLA; 15Hz, 0.375mm)、高頻率低振幅(HFLA; 30Hz, 0.375mm)和無振動運動(CON; 0Hz and 0mm)。在振動運動前測驗膝伸肌之最大自主收縮(MVC)，之後進行10×1分鐘（間歇休息1分鐘）的振動或無振動刺激，隨後立即進行30秒溫蓋特測驗。在划船測驗中透過表面肌電圖檢測股四頭肌的肌電活性以及使用攝影機記錄划船測功儀螢幕上顯示功率輸出之參數。結果：四種處理之間的峰值功率與平均功率輸出皆未達顯著水準(p>.05)。慣用腳的均方根肌電訊號在四種處理之間皆未達顯著差異(p>.05)。然而，HFLA處理後，在峰值功率輸出時非慣用腳股外側肌的均方根肌電訊號顯著高於HFHA與CON(p<.05)。此外，均方根肌電訊號除以峰值功率所得之商數在四種不同處理之間未達顯著水準(p>.05)。結論：單次全身振動無法增進無氧運動表現，且HFLA振動可能會降低優秀划船選手進行無氧動力測驗時非慣用腳徵召運動單位的效率。

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.

肌電圖; 神經效率; 划船; 溫蓋特無氧動力測驗

Electromyography; Neural efficiency; Rowing; Wingate anaerobic power test