基于步态周期下跨栏运动员步态及下肢表面肌电特征分析

发布时间：2019-06-15 06:31

【摘要】：背景:近年来对跨栏运动员的研究方法主要采用录像解析结合DLT算法获取技术参数,对跨栏运动员正常步行下步态和表面肌电特征的研究甚少。目的:实验旨在完整步态周期下,探讨跨栏运动员步态及下肢表面肌电特征的变化。方法:男性专业跨栏运动员8名在步道上分别进行步态和下肢表面肌电测试,运用数理统计法分析步态、下肢表面肌电信号的差异。结果与结论:(1)跨栏运动员步态参数无显著性差异(除步长外);(2)完整步态周期中,随着步态的周期性变化,下肢同名肌肉表面肌电呈左右交替的肌电活动;(3)下肢肌群中攻栏腿的中位频率和平均功率频率值大于摆动腿(除股二头肌、胫骨前肌及腓肠肌外侧),但攻栏腿的平均肌电值和肌电积分值小于摆动腿;(4)站立相阶段,下肢各肌群攻栏腿的中位频率和平均功率频率值大于摆动腿(除胫骨前肌),但攻栏腿的平均肌电值和肌电积分值小于摆动腿(除比目鱼肌);(5)摆动相阶段,下肢各肌群攻栏腿的中位频率和平均功率频率值大于摆动腿(除胫骨前肌及腓肠肌外侧),但攻栏腿的平均肌电值和肌电积分值小于摆动腿(除比目鱼肌);(6)结果显示:完整步态周期中,跨栏运动员步态参数差异不显著,下肢同名侧肌肉表面肌电信号随步态的周期性运动呈左右交替的肌电活动,各肌群攻栏腿和摆动腿表面肌电频域和时域具有不同程度的差异,且攻栏腿肌肉力量小于摆动腿。
[Abstract]:Background: in recent years, the research methods of hurdle athletes mainly use video analysis combined with DLT algorithm to obtain technical parameters, but little research on gait and surface EMG characteristics of hurdlers under normal walking. Objective: to investigate the changes of gait and electromyography (EMG) of hurdlers under the complete gait cycle. Methods: eight male professional hurdlers were tested on gait and lower extremity surface EMG, and the differences of gait and lower extremity surface EMG were analyzed by mathematical statistics. Results and conclusion: (1) there was no significant difference in gait parameters of hurdle athletes (except step size); (2). With the periodic change of gait, the myoelectric activity of muscle surface of the same name of lower extremity showed alternation between left and right. (3) the median frequency and average power frequency of the hurdle leg in the lower extremity muscle group were higher than those of the swinging leg (except biceps femoris, anterior tibia muscle and lateral sural muscle), but the average EMG value and EMG score of the hurdle leg were lower than those of the swinging leg. (4) in the standing phase, the median frequency and average power frequency of the leg of each muscle group of the lower extremity were higher than those of the swinging leg (except the anterior tibia muscle), but the average EMG value and EMG score of the hurdle leg were lower than those of the swinging leg (except soleus muscle). (5) in the swing phase stage, the median frequency and average power frequency of the hurdle leg of each muscle group of the lower extremity were higher than those of the swinging leg (except the anterior tibia muscle and the lateral sural muscle), but the average EMG value and EMG score of the hurdle leg were lower than those of the swinging leg (except soleus muscle). (6) the results showed that there was no significant difference in gait parameters of hurdle athletes in the complete gait cycle. The EMG signal on the muscle surface of the same name side of lower extremity showed alternating EMG activity with the periodic movement of gait. The EMG on the surface of hurdle leg and swing leg had different degrees of difference in frequency domain and time domain, and the muscle strength of hurdle leg was smaller than that of swinging leg.
【作者单位】：西南大学体育学院国家体育总局体质评价与运动机能监控重点实验室;重庆三峡学院;
【基金】：重庆市研究生科研创新项目(CYS14076)~~
【分类号】：G822.6

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