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研究生:宋光裕
研究生(外文):Song, Guang-Yu
論文名稱:不同加速度與膝關節彎曲角度的全身震動刺激對下肢肌群肌電表現及共同收縮之影響
論文名稱(外文):The influence of whole body vibration at different accelerations and knee flexion angles on EMG activation and co-contraction of the lower limbs
指導教授:林威秀林威秀引用關係李恆儒李恆儒引用關係
學位類別:碩士
校院名稱:國立嘉義大學
系所名稱:體育與健康休閒研究所
學門:民生學門
學類:運動休閒及休閒管理學類
論文種類:學術論文
論文出版年:2009
畢業學年度:97
語文別:中文
中文關鍵詞:全身震動肌電圖共同收縮
外文關鍵詞:whole-body vibrationEMGco-contraction
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短期與長期的全身震動刺激(Whole body vibration, WBV)能對肌力與爆發力有顯著的提升效果。WBV利用震動機台讓使用者產生全身性的震動,可以在人體產生相當於0.7g~4g的重力加速度變化(g值)(1g=9.8 m/s2)。過去研究對這兩因子(頻率的改變、震幅的調控)所共同產生的重力加速度變化卻鮮少加以討論。WBV大多採用下蹲姿勢進行下肢肌群刺激,但進行震動刺激時下肢肌電訊號、下肢共同收縮情形是否會隨著膝關節彎曲角度而有所改變,都是未被清楚探討的問題。所以本研究希望透過肌電訊號,來分析探討在不同膝關節屈曲角度搭配接受不同g值之全身震動刺激下,下肢股內側肌(Vastus medium,VM)與股二頭肌(Bicepes femoris,BF)收縮的情形以及兩者共同收縮比例之變化。
本實驗招募20名一般健康大學生(11男,9女),以表面肌電儀監測慣用腳股內側肌與股二頭肌肌肉活化情形。先以三種角度(90、60、45度)半蹲姿勢進行無震動刺激之測試(Non-Vibration, NV),並紀錄EMG訊號。再以三種膝關節彎曲角度(90、60、45度)接受震動刺激(WBV),震動刺激為隨機採用0.98、2.52、3.72、5.61等四種G值,並紀錄EMG訊號。統計顯著水準定為 α= .05,以成對樣本t檢定比較有無震動刺激肌電訊號,以NV及震動實驗的標準化肌電(%MVC)平均值為本研究的依變項,自變項為g值及膝關節彎曲角度。以重複量數二因子變異數分析(two-way ANOVA with repeated measures)比較不同g值及不同角度的肌電反應的差異以及下肢肌群共同收縮比例。股二頭肌標準化肌電之平均值在膝關節彎曲60度在0.98~3.72g與45度0.98~5.61g的震動刺激情況下,皆顯著高於對照實驗;而在股內側肌接受震動刺激的肌電情形可以發現膝關節彎曲45度時,0.98與2.52g有達到顯著的提昇肌肉活化反應的效果(%MVC=21.5±13.2與23.8±17.3)。
在適當的震動刺激之下股二頭肌與股內側肌的肌肉活化程度會顯著提升,但是從本研究中發現股二頭肌與股內側肌肌群的肌肉活化程度還是受到膝關節彎曲角度影響較大。但在膝關節彎曲45度的情形下搭配0.98、2.52兩種g值對於股二頭肌與股內側肌都有很好的活化刺激效果,或許可以作為震動刺激結合下蹲運動時候的參考依據。
The influence of whole body vibration at different accelerations and knee flexion angles on EMG activation and co-contraction of the lower limbs
Song, Guang-Yu
Graduate Institute of Physical Education, Health, and Leisure Study
National Chiayi University
Abstract
Whole body vibration (WBV) could improve muscle strength and power immediately after intervention or in long term training. The vibration platform was used to transduce oscillations from feet up to human body and can produce approximate 0.7~4 times of gravitational acceleration (g value) (1g=9.8m/s2). To the best of knowledge, few studies have discussed the effects of different g values on human body during WBV stimulations. The squat position was commonly suggested while undergoing the WBV stimulations. However, under that squat position, the influence of WBV on the muscle activations and co-contraction of lower extremity at different knee flexion angles were unclear. The purpose of this study was to analyze the muscle activation levels and co-contraction ratios of vastus medium (VM) and bicepes femoris (BF) at different knee angles and g values during WBV stimulations.
Twenty healthy college students (11 male and 9 female) were recruited in this study. Subjects were asked to take Non-Vibration (NV) and WBV at different levels (0.98g, 2.52g, 3.72g, 5.61g) with knee flexed at 45, 60, 90 degrees. EMG signals were recorded simultaneously during NV and WBV. Two-way ANOVA with repeated measures was used to compare EMG levels and co-contraction ratio at difference knee angles and g values. WBV EMG activation level of BF was significantly higher than NV when knee flexed at 60 degrees (0.98~3.72g) and 45 degrees (0.98~5.61g) during WBV stimulations. WBV EMG activation level of VM was significantly higher than NV at 0.98g and 2.5g when knee flexed 45 degrees.
The VM and BF muscles activation could be significantly increased by appropriate vibration stimulation and the activation levels were mainly affected by knee flexion angles. The results of this study suggested that combination of squat position at knee flexion 45 degrees with 0.98/2.52 g WBV stimulations could have better effects on enhancing lower extremity muscle activations.
中文摘要…………………………………………………….......… i
英文摘要…………………………………………………….....… iii
目次…………………………………………………………......… v
表次…………………………………………………………….... vii
圖次…...……………………………………………………….... viii
第一章 緒論
第一節 研究背景……………………………………………….……… 1
第二節 研究動機與目的……………………………………….……… 1
第三節 研究假設……………………………………………….…….... 3
第四節 名詞釋義……………………………………………….……… 3
第五節 研究範圍與限制……………………………………….……… 4
第二章 文獻探討
第一節 震動刺激之短期效應與長期訓練效果……….....................… 5
第二節 震動刺激之肌電圖相關文獻與訊號處理…………………..... 7
第三節 股二頭肌相對於股四頭肌之共同收縮情形之探討…...…….. 8
小結……………………………………………………………….…….. 9
第三章 研究方法與步驟
第一節 研究對象………………………………….………………….. 11
第二節 研究工具…………………………………………………...… 11
第三節 研究實施程序……………………………………………...… 14
第四節 資料處理…………………………………………………....... 17
第五節 統計分析………………………………………………...…… 19
第四章 研究結果
第一節 全身震動刺激對股二頭肌(BF)之影響………………..…..... 20
第二節 全身震動刺激對股內側肌(VM)之影響…………….….....… 21
第三節 不同g值與屈膝角度之交互作用與主要效果…………..…. 22
第五章 討論與建議
第一節 震動刺激與對照實驗進行比較…………………….……..… 28
第二節 g值與角度對於BF與VM肌群之影響……………….....… 29
第三節 震動刺激時的BF/VM共同收縮…………………….…...…. 31
第四節 結論與建議............................................................................... 33
參考文獻
中文部分…………………………………………………………….… 34
外文部分………………………………………………………….…… 34
附錄
附錄一 ................................................................................................... 39
中文部分
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