最近相關文獻指出振動刺激或訓練有助於增進肌力、爆發力，而本研究目的在於探討不同振動刺激頻率與負荷對下肢伸膝肌耐力之影響。經立意取樣選取大專體育科系學生25名，採用翔麟科技公司所研發出的局部振動訓練儀器作為實驗器材，先檢測各受試者下肢伸膝動作的最大自主性收縮力量(maximum voluntary Isokinetic contraction, MVIC)，再以平衡次序法分為不同振動刺激頻率(10Hz、30Hz)、不同負荷重量(50% MVIC、60% MVIC、70% MVIC)兩操作介入模式，探討對下肢伸膝肌耐力之影響。結果發現在總執行負荷量而言，10Hz刺激介入模式的三負重分組其統計考驗結果達顯著水準(50% MVIC ＞ 60% MVIC ＞ 70% MVIC）。在反覆次數方面，振動頻率10Hz、30Hz組，統計考驗結果皆達顯著水準，10Hz組事後比較發現50% MVIC ＞60% MVIC ＞ 70% MVIC。在60% MVIC負荷重量時，10Hz組與30Hz組的反覆次數統計考驗結果達顯著水準，事後比較發現30Hz組大於10Hz組。在相同振動刺激頻率時，不同的負荷重量對於下肢伸膝肌耐力有顯著性差異。研究結果發現以30Hz振動刺激頻率與60% MVIC負荷重量組合，較能有效刺激神經反應、活化運動單位。研究結論指出最佳化的振動刺激頻率範圍與負荷重量操作組合，能有效提升下肢肌耐力的表現，進而提升整體運動表現。
Some previous studies indicated that vibration stimulus or training was an effective way to increase power and strength. Therefore, the purpose of this study was to investigate the effects of different vibration stimulus and load weight combinations on the lower body leg extension endurance. Methods: subjects were 25 college students were recruited to participate in this study. The partial vibration instrument, which developed by Sing Lin technical corporation was used for this study. Maximal Voluntary Isometric Contraction (MVIC) of leg extension test was done prior to the study, and then all subjects divided into two groups, different vibration stimulus (10Hz, 30Hz) and weight load (50% MVIC, 60% MVIC, 70% MVIC) by counter-balance design to evaluate leg extension endurance. Results: Performance in 10Hz group total work test had significant differences that 50% MVIC ＞ 60% MVIC ＞ 70% MVIC, respectively. In repeat counter test, both 10Hz and 30Hz group had shown significant difference, and 50% MVIC ＞ 60% MVIC ＞ 70% MVIC in 10Hz respectively. In further, 30Hz group performed better than 10Hz group within 60% MVIC, different MVIC loading had significant influence on lower body muscular endurance performance within the same vibration frequency, according to the results, the combination of 30Hz vibration frequency and 60% MVIC training has better effects. In conclusion: optimal vibration frequency and loading combination could improve lower body muscular endurance and positive effects on sports performance.
