Kinematic Analysis Of High Pressure Ball Technique In Elite Male Tennis Players

This paper uses the method of literature and three-dimensional video analysis to analyze the high-pressure ball technology in the world's outstanding male tennis players Dimitrov,Auger-Aliassime,Bublick,Harris during the Chengdu Open(ATP250),and compares and analyzes the obtained kinematics data.By studying the technical movements of tennis high pressure ball of professional tennis players,the kinematics characteristics of high pressure ball technology are analyzed,and reasonable theoretical support and data reference are provided for the guidance of coaches and the training of athletes.For tennis amateurs have a deeper understanding of the norms of tennis high-pressure ball technology,in the study process,avoid the formation of wrong action.The following conclusions were drawn:(1)Backward patting stage:the changes of left and right knee joints of Auger-Aliassime and Bublik were higher than those of Dimitrov and Harris.At the end of the lead shot,Dimitrov,Harris had smaller shoulder angles than Auger-Aliassime,Bublick,and the shoulder opening was not sufficient,which was not conducive to the storage of muscle strength around the shoulder joint.The shoulder and elbow velocities of Auger-Aliassime and Bublik are larger than that of Dimitrov and Harris,which is beneficial to obtain kinetic energy and reduce energy consumption.(2)Swing batting stage:at the time of the racket touches ball,Dimitrov,Harris' right shoulder angle and right elbow angle are smaller than Auger-Aliassime,Bublik,the shoulder of the racket arm,elbow angle extension is not enough,resulting in a lower point of hitting.Auger-Aliassime,Bublik's shoulder and elbow angle are obviously larger,in the swing batting stage,the shoulder joint rotation amplitude is larger,the radius is larger,causes the end link to drive the racket rotation linear speed to be bigger,is advantageous to speed up the racket head speed.Shoulder speed,elbow speed,wrist speed,pat speed in turn become larger,belong to the typical whipping action.Compared with Dimitrov and Harris,Auger-Aliassime and Bublick have faster shooting speed,higher hitting point,stronger offensive and better hitting effect.Auger-Aliassime,Bublik shoulder and hip from ready to racket touch he rotation angle of the face projection angle is not different and close to 60°,which can release the elastic potential energy well,while the rotation angle of dimitrov and harris is small,which is not conducive to the release of elastic potential energy.(3)With the wave stage:Bublick's upper torso lean forward larger,will increase with the wave buffer time,is notconducive to timely return.Harris' s relatively large left and right hip angles at the end of the swing indicate that Harris' whipping at the stroke stage is inadequate.(4)Summary:through the comparison and analysis of the kinematics parameters of four athletes in the three stages of high pressure ball technology in the Chengdu Open,it is found that there are some differences in the high pressure ball technology of different and the rationality of the high pressure ball technology action is the guarantee of the batting quality.