The Influence Of Tennis Racket's Absorber On The Groundstroke Performance And Racket-hold Forearm's Impact Force

With ternnis hot popular in the four corners of the world, especially in li won the French open champion; after the Australian open champlain,tennis craze swept every corner of China. Many athletes and tennis enthusiasts due to early exercise training on unreasonable or technical errors, produced variety of injuries. One of the most common on the outside of the humerus condyle inflammation, someone pointed out that its stroke iS a kind of can not be ignored in elbow pathogenic factors,such as the use without shock absorber of the racket to the vibration of the arm is very strong, easy to cause the tennis elbow.Other researchers have proposed shock absorber can reduce the vibration of thehit, but it will affect the athlete' s handle, may go against scores of the game.Therefore this study by adopting Trigno wireless emg acquisi on system, dynamic signal acquisition system, YSV YSV dynanic strain gauge,the strain gun, ITN reference international. tennis level test technology,precision of Beijing sports university ternnis special 15 secondary athletes, using different forehand position shock absorber of the racket,observation and analysis of shock absorber depend on, lower and not wearing a shock absorber of the racket., in effect, and shot the stress variation in the collision frequency, the racket and hit the ball. in muscle eiectromyography discharge time, the relationship between the root mean square value, data collection and analysis. By studying the following conclusions:1?shock absorber presence would have no impact in tennis forehand stroke effect; Main show is on the bali and hit the ball control.2?shock absorber location will not be on the forehand,perpendicular to the acce leration of the racket impact; Will esinificant change to the racket of resilience; But can reduce the hit the racket vibration frequency and a significant decrease.3?because of the reason of the resetlement shock absorber in the forehand, the radial muscle, called lateral brachial wrist flexor, before turning round muscle, refers to the discharge of the extensor time than no shock absorber racket forehand discharge time is tong, but a significant difference. The RMS and spin round before muscle RMS value was significantly increased, that muscle activation discharge to reduce the impact effect on the elbow of the load. As a result, the shock absorber can reduce the load of forearm forehand.The data in this study hope to be able to experiment tennis enthusiasts and athletes to provide some beneficial advice and assistance in the choice of the shock absoober.