我國運動員馮杰旋轉式推鉛球各技術階段主要用力肌群sEMG分析
[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.
【學位授予單位】:西安體育學院
【學位級別】:碩士
【學位授予年份】:2017
【分類號】:G824.1
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