| Abstract: | 職場暴露於振動被認定是健康風險因子之一，但振動卻經常被用來做為物理治療與肌肉強度訓練。儘管多年來振動對肌肉能力的影響一直是感興趣的議題，但有關振動刺激後肌肉活化與性能的研究，卻呈現出不一致的結果。在運動與復健領域，當振動刺激被作為取代訓練的方法來強化肌肉，一個令人關切但未被充分探討的議題，乃是依照個人響應給予最佳振動強度。
本研究中將記錄肌電訊號(EMG)，收集來自受到振動暴露的20位受試者的肌群，不同頻率與振幅的振動通過正弦振盪平台遞送，經過加速度計與EMG數據分析處理來計算肌肉運動與活化情況。
由於下肢肌肉可阻尼振動平台的機械波，腿部姿勢亦將影響傳至肌肉的振動強度。振動暴露期間，膝蓋屈曲對於肌肉活化與振動傳遞的影響，亦將為研究內容之一。本次所提研究之目的是探討振動產生之肌肉運動和相應肌電訊號間的關係，並進而探討肌肉出力下，振動對股外?肌(Vastus Lateralis, VL)、股內側肌(Vastus medialis, VM)、股直肌(Rectus femoris, RF)、腓腸肌(Lateral gastrocnemius, LG)等肌群活化之影響。
研究結果顯示當肌肉受到全身振動時，會使得肌肉的出力程度相對增加，肌肉的活化程度也會增加，而此結果可提供振動危害預防、醫療復健、運動訓練等領域參考運用。
Workplace exposure to vibration is considered a health risk factor, but vibration is often used for physical therapy and muscle strength training. Although the effect of vibration on muscle capacity has been an issue of interest for many years, studies on muscle activation and performance after vibration stimulation have shown inconsistent results. In the field of sports and rehabilitation, when vibration stimulation is used as a method to strengthen muscles instead of training, a topic that is a concern but not fully explored is to give the best vibration intensity according to individual response.
In this study, electromyographic signals (EMG) will be recorded, and muscle groups from 20 subjects exposed to vibration will be collected. Vibrations of different frequencies and amplitudes will be delivered through a sinusoidal oscillation platform, and the muscles will be calculated and processed through accelerometer and EMG data analysis Exercise and activation.
Since the lower limb muscles can dampen the mechanical waves of the vibration platform, the posture of the legs will also affect the intensity of the vibrations transmitted to the muscles. The impact of knee flexion on muscle activation and vibration transmission during vibration exposure will also be one of the research topics.
The purpose of this research is to explore the relationship between vibration-induced muscle movements and corresponding myoelectric signals, and further explore the effects of vibration on the Vastus Lateralis (VL) and Vastus medialis (VM), Rectus femoris (RF), Lateral gastrocnemius (LG) and other muscle group activation.
The research results show that when the muscle is subjected to whole body vibration, the degree of muscle output will be relatively increased, and the degree of muscle activation will also increase. This result can provide reference applications in the fields of prevention of vibration hazards, medical rehabilitation, and sports training. |
