Kinematic Diagnosis Of Serving The 4.0 Men's Tennis Players In Wuhan City

Research Background:Tennis is a different ball game from the network of small ball sports,tennis and sports venues large.At the same time tennis is a special skills and physical coordination requirements of the network barrier against the movement,when the players in the fierce competition,the need to continue to respond in a timely manner,adjust the pace of movement,and timely to the ball to take the best Approach,the players usually training and technical action basis has a close relationship.And a tennis game is from the start of the ball,the player's service quality directly affect the outcome of the whole game.According to the literature,it is found that the study of tennis amateur players in our country is basically in the blank stage.Most of the research on the serve is favored by tennis professional players.Therefore,from the perspective of sports biomechanics,It is of great research value to study and explore its action characteristics.Research purposes:According to the literature,it is found that the study of amateur tennis athletes in our country is basically in the blank stage.Most of the relevant research areas focus on the tennis technical analysis of China's outstanding professional tennis players and provincial-level national training teams.Through this study,To understand the technical level of the excellent amateur tennis players in China,and to compare with the relevant kinematic indexes of the excellent tennis players in China,and to find out the shortcomings of the amateur players.The theory of amateur tennis players to provide technical basis.Research methods:In this paper,the Wuhan City in the network level league(Wuhan station)and the National Finals(4.0 and 5.0 level)the top three winners of the seven men's tennis amateur players to complete the action as a research object,the use of two PULNIX camera using fixed-point(External synchronization)shooting,the frequency of 120 frames / sec,the use of the United States ARIEL three-dimensional image analysis system for players to analyze the technical action.The experimental data are compared with the kinematic parameters of the domestic excellent tennis players,and the relevant action characteristics of the study object are diagnosed in combination with the special theory.Research result:(1)The stage of the ball throwing,Wuhan City,4.0 men's tennis players and China's outstanding athletes Bo Yan,?Chen Sa related kinematic indicators comparison,the height of the ball throw height and height are high,hip speed Slow,shoulder,elbow angle and the ideal 90 ° there is a big gap,knee pedal extension speed smaller.(2)Scratching stage,Wuhan City,4.0 men's tennis players and China's outstanding athletes Bo Yan,?Chen Sa related kinetic indicators of comparison,the action is not smooth,the hip is not active rotation,lower limb power chain pedal speed is slower,Knee angle is small,ankle angle larger.(3)Shooting stage,Wuhan City,4.0 men's tennis players and China's outstanding athletes Bo Yan,?Chen Sa related kinetic indicators comparison,the hip active rotation is not enough,uneven speed,but the upper limb hit the joints more reasonable.Analysis conclusion:(1)Throwing the ball stage,Wuhan City,4.0 men's tennis players left hip stiffness,shoulder and elbow joint angle larger,knee joint squat range smaller.(2)Scratching stage,Wuhan City,4.0 men's tennis players did not advance the hip joint,knee and ankle pedal extension amplitude varies,but the shoulder and elbow joint pulling speed is ideal.(3)Batting stage,Wuhan City,4.0 men's tennis players to serve the final batting stage,the hip rotation speed is very uneven,ankle,knee more ideal,upper limb joints can get the whole serve more than the speed.