本文選題：肌肉收縮 + 動作反應時��； 參考：《蘇州大學》2012年碩士論文

【摘要】：研究目的：對肱二頭肌進行不同水平收縮力量及不同負荷疲勞后的反應時測試，以研究不同負荷的肌收縮過程中動作反應時變化特征，并在實驗結果的基礎上為需要快速反應的運動提供理論指導。 研究方法：選取12名健康男性在校大學生為本研究測試對象，同步CON-TREX等速肌力測試系統(tǒng)和BIOVISION運動生物電測試系統(tǒng)，并利用自制的光信號裝置，測試肘關節(jié)肱二頭肌不同負荷等長收縮過程中和疲勞后的反應時。通過Dasylab10.0軟件對肌電原始數據進行處理分析得出反應時各指標數據，，采用單因素方差分析，統(tǒng)計學水平選為α=0.05。 研究結果： （1）隨收縮力量水平的提高，電機械延遲（EMD）呈下降趨勢，不同收縮力量水平間EMD的差異極具顯著性； （2）運動前時（PMT）和反應時（TRT）與收縮力量的大小之間無明顯相關趨勢，不同收縮力量水平之間PMT值和TRT值的差異均不具有顯著性。 （3）疲勞后EMD延長；疲勞后與疲勞前相比EMD值差異均極具顯著性；不同疲勞負荷之間的EMD值差異不具有顯著性。 （4）疲勞后與疲勞前相比TRT和PMT值差異均不具有顯著性；不同疲勞負荷間的PMT和TRT值差異不具有顯著性。 研究結論： （1）EMD受收縮力量水平的影響，其數值隨著收縮力量水平的提高而減小，原因可能是由于串聯彈性成分的特殊的物理性狀造成的；在收縮力量水平較低時，EMD值隨著力量水平的提高而減��；收縮力量水平提高到一定程度后，繼續(xù)提高，則EMD值不再減小。 （2）PMT值不受肌肉收縮力量水平的影響，不同收縮力量水平的PMT值無差異；收縮力量水平通過對EMD的影響進而影響到TRT，但不同收縮力量水平的TRT值之間無明顯差異。 （3）疲勞后EMD延長；不同負荷疲勞后EMD延長大小無明顯差異。 （4）疲勞后PMT和TRT無明顯變化；由于EMD占TRT比例較小，其變化不易引起TRT變化。
[Abstract]:Objective: to test the response time of biceps brachii muscle after fatigue with different levels of contractile strength and load, and to study the changing characteristics of action response time in the process of muscle contraction under different loads. On the basis of the experimental results, it provides theoretical guidance for the movement that needs rapid response. Methods: twelve healthy male college students were selected as the subjects of this study. The CON-TREX isokinetic muscle strength test system and the BIOVISION exercise bioelectric test system were used, and the self-made light signal device was used. The reaction time of elbow biceps during isometric contraction and after fatigue was measured. The EMG raw data were processed and analyzed by Dasylab10.0 software, and each index data was obtained. The single factor ANOVA was used, and the statistical level was chosen as 偽 0. 05. Results of the study: (1) with the increase of contractile force level, the electromechanical delay (EMD) showed a downward trend, and the difference of EMD between different contractile force levels was very significant. (2) there was no significant correlation between PMT and TRT before exercise and the magnitude of contractile force, but there was no significant difference in PMT and TRT between different contractile force levels. (3) EMD was prolonged after fatigue, the difference of EMD between fatigue and fatigue was extremely significant, and the difference of EMD between different fatigue loads was not significant. (4) there was no significant difference in TRT and PMT after fatigue, but no significant difference in PMT and TRT between different fatigue loads. The study concluded that: The EMD is affected by the contraction force level, and its value decreases with the increase of the contraction force level, which may be due to the special physical properties of the series elastic component. When the contraction force level is low, the EMD value decreases with the increase of the force level, and when the contraction force level increases to a certain extent, the EMD value will no longer decrease. The PMT value of different contractile force level was not different from that of muscle contractile force level, but the TRT value of different contractile force level had no obvious difference by the influence of contractile force level on EMD. (3) EMD was prolonged after fatigue, but there was no significant difference in EMD prolongation after fatigue under different loads. (4) PMT and TRT did not change obviously after fatigue, but the change of EMD was not easy to cause the change of TRT because the ratio of EMD to TRT was small.
【學位授予單位】：蘇州大學
【學位級別】：碩士
【學位授予年份】：2012
【分類號】：R87

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