我国运动员冯杰旋转式推铅球各技术阶段主要用力肌群sEMG分析

发布时间：2019-06-28 19:11

【摘要】：研究目的:本文主要采用遥感肌电结合高速摄像技术对冯杰旋转式推铅球各技术阶段的主要用力肌群进行测试。通过所测数据找出各技术阶段主要用力肌肉的放电时间顺序、用力大小顺序及贡献率等,进而揭示旋转式推铅球的肌肉用力特征。并在此基础上进行总结,改善运动员不正确的发力习惯,避免身体各部位在投掷铅球过程中用力不集中。为运动员在今后的技术及专项力量训练中安排合理的训练计划,同时也为同类项群运动项目提供一定的理论支撑依据。研究方法:采用芬兰产的Megawin6000便携式8导肌电仪采集运动员前后两次测试的肌电数据,运用Megawin肌电分析软件并结合影像视频同步对数据进行筛选处理。通过分析得出以下几点研究结果:1.双支撑阶段右竖脊肌、右股四头肌、左股二头肌在放电时间顺序上相对稳定;右竖脊肌、右臀大肌肌电信号同步化程度较高,且是该阶段主要发力肌肉,同步化和贡献率最低的是左股二头肌、右腹外斜肌。2.单支撑阶段在放电时间顺序上右竖脊肌、右臀大肌、左股四头肌、右腹外斜肌放电效果相对稳定;右竖脊肌、左股二头肌、左股四头肌是该阶段主要发力肌肉,右腓肠肌后段、右股四头肌肌电信号同步化和贡献率最低。3.腾空阶段完成动作时间最短,在放电时间顺序上左股二头肌、右竖脊肌、右腹外斜肌放电效果相对稳定;右股二头肌、右竖脊肌、左股四头肌是该阶段主要发力肌肉,右腓肠肌后段肌电信号同步化程度和放电贡献率最低。4.过渡阶段右股四头肌、左股二头肌、右竖脊肌、右腹外斜肌放电时间顺序相对稳定,右股二头肌、左股四头肌、右腹外斜肌肌电信号同步化程度高且是该阶段主要发力肌肉,右臀大肌同步化程度和贡献率相对较弱。5.最后用力阶段右股四头肌、右腹外斜肌、左股二头肌、左股四头肌放电时间顺序相对稳定,右腹外斜肌、右股二头肌、右股四头肌是该阶段主要发力肌肉,右臀大肌、右腓肠肌后段肌电信号同步化程度和贡献率偏低。结论:1.双支撑阶段准备时间充足,更有利于各块肌肉的协调发力,且与成绩的高低呈正相关;另外,右腹外斜肌在整个技术阶段放电不太稳定,尤其是在双支撑阶段。2.右竖脊肌在整个技术阶段中肌肉放电水平相对较好,说明在固定竖立躯干保持旋转的稳定性具有重要的作用;另外,右股二头肌、右股四头肌、右腹外斜肌是过渡阶段和最后用力阶段主要发力肌肉,尤其是右腹外斜肌对投掷成绩的高低具有至关重要的作用。3.在过渡阶段和最后用力阶段中右腓肠肌后段、右臀大肌肌电信号同步化程度和贡献率均偏低。
[Abstract]:Purpose: in this paper, remote sensing EMG combined with high speed camera technique was used to test the main forced muscle groups in each technical stage of Feng Jie rotating shot put. Through the measured data, the discharge time sequence, force order and contribution rate of the main forced muscles in each technical stage are found out, and then the muscle force characteristics of rotating shot put are revealed. On this basis, we can improve the incorrect power habit of athletes and avoid the inconcentration of all parts of the body in the process of shot put. It provides a reasonable training plan for athletes in the future technical and special strength training, and also provides a certain theoretical basis for the same kind of sports. Research methods: Megawin6000 portable 8-guide EMG instrument made in Finland was used to collect the EMG data of athletes before and after the test. Megawin EMG analysis software and image and video synchronization were used to screen and process the data. Through the analysis, the following research results are obtained: 1. In the double support stage, the right vertical spinal muscle, the right quadriceps femoris and the left biceps muscle were relatively stable in the order of discharge time, and the electrical signals of the right vertical spinal muscle and the right gluteus maximus muscle were more synchronous, and were the main muscle at this stage, the lowest synchronization and contribution rate were the left biceps femoris and the right extraventral oblique muscle. 2. In the single support stage, the discharge effect of right vertical spinal muscle, right gluteus major muscle, left quadriceps femoris and right extraabdominal oblique muscle was relatively stable, and the synchronization and contribution rate of right vertical spinal muscle, left biceps femoris and left quadriceps femoris were the lowest in the posterior segment of right peroneal muscle and right quadriceps muscle. In the order of discharge time, the discharge effect of left biceps femoris, right vertical spinal muscle and right extraabdominal oblique muscle was relatively stable. Right biceps femoris, right vertical spinal muscle and left quadriceps muscle were the main muscle at this stage, and the synchronization degree and discharge contribution rate of EMG in the posterior segment of right peroneal muscle were the lowest. 4. During the transition stage, the discharge time of right quadriceps femoris, left biceps femoris, right vertical ridge muscle and right extraabdominal oblique muscle was relatively stable, and the synchronization degree of right biceps muscle, left quadriceps muscle and right extraabdominal oblique muscle was high and was the main muscle at this stage, and the synchronization degree and contribution rate of right gluteus major muscle were relatively weak. 5. Finally, the discharge time sequence of right quadriceps femoris, right extraabdominal oblique muscle, left biceps femoris and left quadriceps muscle was relatively stable. Right external oblique muscle, right biceps femoris, right quadriceps femoris muscle were the main muscle, right gluteus major muscle and posterior segment of right peroneal muscle. Conclusion: 1. The preparation time of the double support stage is sufficient, which is more beneficial to the coordinated power of each muscle, and is positively correlated with the score. In addition, the discharge of the right extraventral oblique muscle is not very stable in the whole technical stage, especially in the double support stage. 2. The discharge level of right vertical spinal muscle is relatively good in the whole technical stage, which indicates that it plays an important role in maintaining the stability of rotation in the fixed vertical torso. In addition, the right biceps femoris, right quadriceps femoris and right epigastric oblique muscle are the main driving muscles in the transition stage and the final force stage, especially the right extraventral oblique muscle, which plays an important role in the throwing performance. 3. The right biceps muscle, the right quadriceps muscle and the right epigastric lateral oblique muscle play an important role in the throwing performance. 3. In the transition stage and the final force stage, the synchronization degree and contribution rate of the right gluteus maximus EMG signal were low in the posterior segment of the right sural muscle.
【学位授予单位】：西安体育学院
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：G824.1

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