A Comparative Analysis Of The Surface EMG Characteristics Of Male Tennis Players' Serve Techniques At Different Levels

Objective: previous studies have found that the advantages of methods of electrical technology application in sports is a good way to show power characteristics of muscle during exercise,and can be intuitive,rapid feedback function change characteristics of muscle system,but in the process of the tennis serve,serve different will lead to the change of muscle power characteristics were different,this kind of information research is less?The purpose of this paper is to analysis different levels in men's tennis athletes(professional and amateur)in flat to the characteristics of the main force in the process of firing ball muscle,muscle methods of electrical measurement results and methods of the change of electrical characteristics and correlation index,further explore the pros and cons of technical service,training for the tennis training,prevent muscle injury after provide certain theoretical basis,and help to different level of tennis player(professional and amateur)between how the use of fast and efficient service technology,find better serve targeted training system and better promote the popularization of tennis movement and discipline development.Serve has become the bottleneck of restricting our tennis players ability to play one,therefore,to change,to serve ascension offensive is the key to tennis technology and serve the tennis technology and the way of muscle power and features for there is a larger relationship,this paper will send force to muscle characteristics in different stages of the tennis is analyzed through the methods of electrical technology.Methods:using 16 guide methods of electric tester is men's professional tennis players in tianjin,amateur tennis athletes and sports college students in tianjin,a total of 32 people for the right hand(for example),divided into professional athletes(figures 8 and 8 level athletes),amateur athletes(8 secondary athletes and tennis special student 8),divided into four groups as the research object,each calculation of flat firing ball serve 10 times,at the same time record flat firing ball 10 times the electromyographic signal of serve into the area,measuring muscle indicators are:Muscle myoelectricity discharge sequence,integral value,RMS value,variance and muscle contribution to reasonable to analysis the data,mainly through the electrical test for main power in the process of the tennis serve muscle characteristics,through contrastive analysis of the professional and amateur athletes flat firing ball,find training method can improve the serve technology,better promote the development of technology of the player to serve.The research results show that the flat firing ball of athletes of different levels of electrical data analysis it is concluded that the muscle power order is(in the right players,for example)they respectively right deltoid,gong radial muscle and trapezius muscle from right,the right hand right hand biceps and triceps,right the latissimus dorsi,rectus right,the left rectus,on the right side of the external oblique muscle,the left side of the external oblique muscle pectoralis major,right,right rectus muscle tibialis anterior muscle gastrocnemius,right,the right leg.(1)in the course of flat hitting and serving,the order of muscle power is basically the same as that of the amateur players,but the order of size is not consistent,and the integral emg value of some muscles is also the same.The contribution rates of the average hit and serve of the elite players are 82.50% and 62.35% respectively,which have significant differences.(2)the contribution rates of muscle power in different parts of the male tennis players at different levels are different during the service process.The integral emg values of the right deltoid,right brachioradialis and right trapezius of the male professional tennis players and first-level players in tianjin are relatively large,and the contribution rate of power is the largest.Than tianjin sports college tennis secondary athletes and special students right deltoid,right hand right hand biceps and triceps muscle of integral value of the secondary electric is large,relatively power contribution is the largest,which indicates that the differences between professional and amateur tennis player,amateur tennis player by reasonable training to compensate for.(3)the root mean square value of the right deltoid,right biceps and right triceps of the three major generating muscles of the second-level tennis players and tennis students of tianjin institute of sport is(P > 0.05),which proves that the difference between the two is not significant.A comparative analysis between professional men's tennis players in tianjin and amateur tennis players in tianjin institute of sports shows that the integral emg values of the six muscles of right deltoid,right brachioradialis,right trapezius,right biceps humerus,right tricepshumerus and right latissimus dorsi are all(P > 0.05),which proves that the difference between the two is not significant.Research conclusions:(1)men's professional tennis athletes in tianjin athletes and secondary level athletes compared with tianjin sports college tennis athletes and tennis sports special students level is higher,and flat,fire the ball of the ball and the success rate,the higher the serve placement is more accurate,to serve the data analysis of inertia is more accurate.(2)tianjin men's professional tennis players and first-level players have high service skills,and the sequence of the initial discharge of each part of the muscles is generally the same during the service.(3)the contribution rate of right deltoid muscle and right brachioradialis muscle in the serving process of the second-level tennis players in tianjin institute of physical education is slightly higher than that of the tennis students.(4)professional and amateur male tennis players cannot analyze the integral emg value and RMS value of muscle by the high and low sport level in the course of flat hitting and serving.