不同负荷的肌收缩过程中动作反应时变化特征

发布时间：2018-06-03 23:28

本文选题：肌肉收缩 + 动作反应时　；参考：《苏州大学》2012年硕士论文

【摘要】：研究目的：对肱二头肌进行不同水平收缩力量及不同负荷疲劳后的反应时测试，以研究不同负荷的肌收缩过程中动作反应时变化特征，并在实验结果的基础上为需要快速反应的运动提供理论指导。研究方法：选取12名健康男性在校大学生为本研究测试对象，同步CON-TREX等速肌力测试系统和BIOVISION运动生物电测试系统，并利用自制的光信号装置，测试肘关节肱二头肌不同负荷等长收缩过程中和疲劳后的反应时。通过Dasylab10.0软件对肌电原始数据进行处理分析得出反应时各指标数据，，采用单因素方差分析，统计学水平选为α=0.05。研究结果：（1）随收缩力量水平的提高，电机械延迟（EMD）呈下降趋势，不同收缩力量水平间EMD的差异极具显著性；（2）运动前时（PMT）和反应时（TRT）与收缩力量的大小之间无明显相关趋势，不同收缩力量水平之间PMT值和TRT值的差异均不具有显著性。（3）疲劳后EMD延长；疲劳后与疲劳前相比EMD值差异均极具显著性；不同疲劳负荷之间的EMD值差异不具有显著性。（4）疲劳后与疲劳前相比TRT和PMT值差异均不具有显著性；不同疲劳负荷间的PMT和TRT值差异不具有显著性。研究结论：（1）EMD受收缩力量水平的影响，其数值随着收缩力量水平的提高而减小，原因可能是由于串联弹性成分的特殊的物理性状造成的；在收缩力量水平较低时，EMD值随着力量水平的提高而减小；收缩力量水平提高到一定程度后，继续提高，则EMD值不再减小。（2）PMT值不受肌肉收缩力量水平的影响，不同收缩力量水平的PMT值无差异；收缩力量水平通过对EMD的影响进而影响到TRT，但不同收缩力量水平的TRT值之间无明显差异。（3）疲劳后EMD延长；不同负荷疲劳后EMD延长大小无明显差异。（4）疲劳后PMT和TRT无明显变化；由于EMD占TRT比例较小，其变化不易引起TRT变化。
[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 伪 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.
【学位授予单位】：苏州大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：R87

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