Akinematics Characteristics And Analysis Of Backhand Screw Ball Of Elite Penhold Table Tennis Palyers Wang Hao And Xu Xin

This paper USES two high-speed cameras to our country excellent table tennis player wang hao,Xu Xin backhand screw technique for 3 d filming,by national team coaches Wu Jingping(Xu Xin and FanZhenDong with coach)selected athletes finish high quality,good video shooting video effect,each athlete selected 10 action respectively,and then use video system analysis software,Kinovea analysis software,QtoolS analysis software,Excel software,etc.To deal with selected video analysis,the kinematics parameters,such as Angle,distance,speed,analyzed the athletes racket back starting moment,racket back end,theyng over time and finish time four specific time point and theyng over the racket back stage,stage and three phase biomechanical characteristics,using the knowledge of sports biomechanics and sports physiology,anatomy parsing,and describes the kinematics characteristic of wang hao and Xu Xin backhand technology,the study found that the wang hao backhand screw technique in structure is better than that of Xu Xin,more in line with the backhand technique principle.Racket back stage,first of all,wang hao pay more attention to the racket back down,to increase the hit of the friction;Xu Xin elbow flexion degree is bigger,the trunk forward degree than wang hao,degree of shoulder joint and elbow on the top of the former is better than wang hao,Xu Xin racket back more,back to the body,elbow and shoulder joint for racket racket back to make space more fully,in order to increase hit power forward.Secondly,wang hao pectoralis major muscle contraction,shoulder adduction adequately,at the same time,shoulders,back muscles passive stretch more fully,the elastic potential energy is bigger,more in line with the principle of biomechanics and physiological anatomy.Stage,first of all,wang hao shot space more fully,more conducive to hit the power.Inadequate Xu Xin body trunk rotation,when the racket back abdominal muscle,the torso muscles such as pectoralis major stored energy is not released in full.Second,wang hao wrist and rotate in order to completely,the direction of the racquet head downward,is conducive to hit concentration,on the contrary,displaying wrist Xu Xin premature to hit the power of concentration,which leads to the final effect to the part of the power of the ball will be scattered away.Theyng over stage,wang hao action more stretch,movement range is larger,Xu Xin body more tension in this phase,movement range is small,this flexibility in practice performance for wang hao backhand twisting,fault tolerance and stability are better than Xu Xin,.In this paper for the play of athletes backhand action technology is of great importance to the scientific training.