Kinematical Analysis On The Skill Of Male Athletes In ATP Tennis

The technology of tennis hit topspin forehand is one of the mostcommonly used technical action, especially in the bottom line attack. The players’forehand technique level plays a vital role in success of the game and also reflects theoffensive capability of athletes. Through literature review,we can see that the currentkinematics analysis of the tennis player forehand technical focused on athletes ingeneral. However, for the world’s elite tennis players during live race, there is almostno learning data acquisition and analysis. Therefore, it is particularly important toanalysis the outstanding tennis player forehand technical action in the game. In thisstudy choose the top three athletes at ATP tennis championship round robin of inChengdu (champion Carlos Moya, runner-up and second runner-up Ainuo Yi Sampras)as the research object and use the three-dimensional imaging analysis tennis forehandtop-spin technique of three athletes, identify common technical features of three tennisplayers and reveal excellent forehand topspin hit kinematic characteristics of technicalmovements. The part of the principles established in line with Sports BiomechanicsKinematics model provide some technical reference data for coaches, athletes training,as well as a wealth of tennis topspin forehand hit technical theory play a practicalsignificance.Through testing the top three athletes hit a forehand topspin technical action at the2011ATP tennis championship round robin (Chengdu, China hold), we get kinematicparameters following conclusions:Moya, Ainuo Yi and Sampras three tennis players’ hit a forehand topspin actionfootsteps stations have adopted the open stance, feet parallel opening, upper body fromshoulder turn sideways ready to hit the ball position to complete the hitting action.At the end of shooting, Moya left hip angle was169.45°, right hip angle was139.77°; handed right shoulder angle was36.36°, elbow angle is111.90°, wrist jointvelocity is4.32m/s. Ainuo Yi left hip angle was143.55°, right hip angle was100.32°;handed right shoulder angle was58.19°, elbow angle was112.52°, wrist joint velocitywas3.12m/s. Sampras left hip angle was150.32°, right hip angle was123.34°;handed right shoulder angle was151.16°, elbow angle was126.95°, wrist jointvelocity was1.07m/s. Moya and Aynaoui have the racket attracted away from thebody but Sampras beat away from the body nearer, the hard-handed arm is passed thebeat in turn.Former swing phase, Moya’s magnitude of the rotation angle of the hip shoulderwas56.44°; Aynaoui was58.30°; Sampras was54.59°. At the end of shooting,When Moya beat the ball, the speed of the right shoulder joint was1.71m/s, of the right elbow was3.68m/s, of the right wrist was6.97m/s, and the speed of the right hand was7.85m/s; Aynaoui the speed of the right shoulder joint was1.44m/s, tof the right elbow was3.19m/s, of the right wrist was5.36m/s, and the speed of the right hand was6.25m/s; When Sampras beat the ball hit,the speed of the right shoulder joint was1.96m/s, of the right elbow was2.94m/s, of the right wrist was4.48m/s, and the speed of the right hand was5.56m/s. Moya racket to hit the ball out of the ground the moment the angle between the trunk and85.44°; Younes El Aynaoui is81.09°; racket face angle with the ground Sampras is80.37°. Moya and Younes El Aynaoui are driven to rely on the elbow wrist spin jitter, played a strong topspin, but there is a change to the process Sampras put the racket in the end, the loss of part of the line speed. But when the three tennis player hitting the ball hard swinging forward at the same time, there is rapid rotation of the wrist arm driven upward movement, the entire torso axis movement is accomplished.Through the analysis of three players’action, we find, compared to Pete Sampras, the Moya and Younes El Aynaoui technical action is consistent forehand topspin attack principle. In the the end of shooting stage, Sampras should take modern ring racket way go. At the end of shooting time, the racket should swing farther away from the trunk, in order to increase hitting the ball affect.