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不同程度緊身壓迫對(duì)踏蹬運(yùn)動(dòng)中下肢sEMG變化特征的影響

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  本文選題:緊身運(yùn)動(dòng)裝 切入點(diǎn):壓迫度 出處:《蘇州大學(xué)》2012年碩士論文 論文類型:學(xué)位論文


【摘要】:研究目的:通過對(duì)采用表面肌電圖技術(shù)所獲得的相關(guān)肌電指標(biāo)數(shù)據(jù)進(jìn)行分析和研究,定量反映不同強(qiáng)度的勻速踏蹬運(yùn)動(dòng)至疲勞過程中,下肢肌群在不同程度緊身壓迫下的sEMG變化特征,進(jìn)而探討緊身壓迫度對(duì)肌肉活動(dòng)的影響,,以期豐富和拓展當(dāng)前運(yùn)動(dòng)訓(xùn)練的機(jī)能評(píng)定內(nèi)容和監(jiān)測(cè)手段,為緊身運(yùn)動(dòng)服裝在健身、訓(xùn)練和比賽等實(shí)踐中的應(yīng)用提供科學(xué)理論依據(jù)。 研究方法:實(shí)驗(yàn)隨機(jī)抽取未進(jìn)行過系統(tǒng)踏蹬訓(xùn)練的青年健康男性受試者10名,在瑞典MANOEK839E功率車上分別以下肢無(wú)緊身壓迫、中度緊身壓迫、高度緊身壓迫狀態(tài)完成中強(qiáng)度和大強(qiáng)度負(fù)荷的勻速踏蹬運(yùn)動(dòng)至疲勞測(cè)試,同步采集與記錄股內(nèi)側(cè)肌、股外側(cè)肌、股二頭肌、腓腸肌內(nèi)側(cè)、脛骨前肌的sEMG信號(hào),并按運(yùn)動(dòng)時(shí)程將其分為10段,再對(duì)iEMG和MF肌電指標(biāo)數(shù)據(jù)進(jìn)行標(biāo)準(zhǔn)化處理,最后采用雙因素方差分析和事后多重比較檢驗(yàn)考察各組實(shí)驗(yàn)數(shù)據(jù)間的差異。 研究結(jié)果:(1)無(wú)緊身壓迫下,下肢肌iEMG(%)值在中強(qiáng)度和大強(qiáng)度負(fù)荷的踏蹬運(yùn)動(dòng)中后期總體表現(xiàn)出隨時(shí)間延長(zhǎng)逐漸增加的趨勢(shì);MF(%)值則在中強(qiáng)度和大強(qiáng)度負(fù)荷的踏蹬運(yùn)動(dòng)中后期總體表現(xiàn)出隨時(shí)間延長(zhǎng)逐漸降低的趨勢(shì);其中,大強(qiáng)度負(fù)荷中的iEMG(%)值增長(zhǎng)幅度和MF(%)值降低幅度均高于中強(qiáng)度負(fù)荷。(2)中度緊身壓迫下,在中強(qiáng)度負(fù)荷踏蹬運(yùn)動(dòng)相鄰時(shí)段之間,下肢肌iEMG(%)值總體增長(zhǎng)幅度及MF(%)值總體降低幅度均與無(wú)緊身壓迫時(shí)無(wú)明顯差異;在大強(qiáng)度負(fù)荷踏蹬運(yùn)動(dòng)后期,除腓腸肌內(nèi)側(cè)無(wú)明顯差異外,股內(nèi)側(cè)肌、股外側(cè)肌、股二頭肌、脛骨前肌iEMG(%)值總體增長(zhǎng)幅度及MF(%)值總體降低幅度均較無(wú)緊身壓迫時(shí)有所下降。(3)高度緊身壓迫下,在中強(qiáng)度負(fù)荷踏蹬運(yùn)動(dòng)后期,除腓腸肌內(nèi)側(cè)無(wú)明顯差異外,股內(nèi)側(cè)肌、股外側(cè)肌、股二頭肌、脛骨前肌iEMG(%)值總體增長(zhǎng)幅度及MF(%)值總體降低幅度均較無(wú)緊身壓迫時(shí)有所下降;在大強(qiáng)度負(fù)荷踏蹬運(yùn)動(dòng)后期,除腓腸肌內(nèi)側(cè)無(wú)明顯差異外,股內(nèi)側(cè)肌、股外側(cè)肌、股二頭肌、脛骨前肌iEMG(%)值總體增長(zhǎng)幅度及MF(%)值總體降低幅度均較無(wú)緊身壓迫時(shí)有所上升。 研究結(jié)論:外加中度緊身壓迫在大強(qiáng)度踏蹬運(yùn)動(dòng)后期與外加高度緊身壓迫在中等強(qiáng)度踏蹬運(yùn)動(dòng)后期對(duì)下肢目標(biāo)肌群的作用相似,均利于維持局部肌肉收縮的輸出功率及外周運(yùn)動(dòng)單位動(dòng)作電位的傳導(dǎo)速率,在一定程度上有助于延緩肌疲勞和延長(zhǎng)運(yùn)動(dòng)時(shí)效;相反,外加高度緊身壓迫在大強(qiáng)度踏蹬運(yùn)動(dòng)后期則會(huì)加速肌疲勞的發(fā)展進(jìn)程。
[Abstract]:Objective: to analyze and study the relevant EMG index data obtained by surface electromyography (EMG) technology, and to quantitatively reflect the different strength of constant speed pedaling to fatigue process. In order to enrich and expand the function evaluation and monitoring methods of current sports training, the sEMG changes of lower extremity muscle group under different degrees of tight compression were discussed, and the effects of tights on muscle activity were discussed. The application in practice such as training and competition provides scientific theoretical basis. Methods: ten young healthy male subjects without systematic pedal training were randomly selected from the Swedish MANOEK839E power vehicle with lower extremity compression without tightness and moderate tightness compression. SEMG signals of medial femoral muscle, lateral femoral muscle, biceps femoris muscle, medial gastrocnemius muscle and anterior tibial muscle were collected and recorded simultaneously under high tibial compression. It was divided into 10 segments according to the exercise time course, and then the iEMG and MF electromyoelectric index data were standardized. Finally, the differences between the experimental data of each group were investigated by using double factor analysis of variance and multiple comparison tests afterwards. Research results: 1) under no tight pressure, The value of iEMG) of lower extremity muscle showed a trend of increasing gradually with the extension of time in the middle and late period of the pedal exercise with medium strength and high intensity load.) the value of iEMG value in the middle and late period of the middle and high intensity load showed the overall trend of prolonging with time in the middle and late period of the pedal exercise. A tendency of gradual decline in length; Among them, the increase range of iEMG value and the decrease of MFN value in heavy load are higher than those in medium strength load. 2) under moderate tightness, the value of iEMG) increases between the adjacent periods of middle strength load pedal exercise, and the decrease range of MFU value is higher than that of medium strength load. There was no significant difference in the total increasing range and MFN value between the lower limb muscle and the lower extremity muscle, except for the medial part of gastrocnemius muscle, lateral femoral muscle, biceps femoris, and biceps femoris, except for the medial part of gastrocnemius muscle. The total increase range of iEMG value of anterior tibial muscle and the decrease of MFN value were lower than those of non-tibial compression. Under the condition of high tibia compression, the medial femoris muscle was not significantly different except for the medial gastrocnemius muscle in the late stage of pedal exercise with moderate strength load. The value of lateral femoral muscle, biceps femoris muscle, anterior tibial muscle iEMGN) increased and MFU decreased slightly compared with those of non-tibial compression, and the medial femoris muscle, except the medial gastrocnemius muscle, had no significant difference in the late stage of pedal exercise with high intensity load. The value of lateral femoral muscle, biceps femoris muscle, anterior tibial muscle iEMG) increased in general and MFU decreased more than that in non-tibial compression. Conclusion: the effect of additional moderate tightness compression on the target muscle group of lower extremity is similar to that of high tightness compression in the late stage of high intensity pedal exercise and that of high tightness compression in the late stage of moderate intensity treading exercise. It is beneficial to maintain the output power of local muscle contraction and the conduction rate of peripheral motor unit action potential to some extent help to delay muscle fatigue and prolong exercise time; on the contrary, The development of muscle fatigue will be accelerated during the later period of high-intensity pedaling.
【學(xué)位授予單位】:蘇州大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2012
【分類號(hào)】:G804.2

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