The Final Stage Of The Run-up Of Huang Changzhou,an Excellent Long Jump Athlete In China,and The Take-off Technique Kinematic Analysis

Long jump is a combination of speed and explosiveness in track and field,and it is also a more traditional sport.The achievements of the men's long jump project in China have risen steadily in the past decade,and a number of young and outstanding players have emerged.The national record and the Asian record have been broken many times.Compare the differences between the National Games Men's Long Jump Champion Huang Changzhou and the World Excellent Team in the final stage of the run-up and the take-off technique,and provide data reference and theoretical basis for the coaches and scientific research staff.This article uses the on-site fixed-point shooting of the 13 th National Games long jump champions in the 13 th National Games,Huang Changzhou,2018 Shanghai Diamond United men's long jump finals video,using the literature data method,two-dimensional video method,video analysis method,mathematical statistics,comparative analysis The method compares,analyzes and summarizes the kinematic parameters of the final stage of the run-up and the take-off technique,and finds the correlation and difference between the kinematic data of Huang Changzhou and the world excellent group.The following conclusions were obtained through research:1.The step size structure of the last 2 steps of Huang Changzhou's run-up is “large?small”.The step difference is different from that of the world's excellent group.The frequency changes greatly,and the rhythm of the running is chaotic,making the countdown 2 steps faster than the world.Excellent group.2.When Huang Changzhou takes off,the board angle and the corner angle are smaller than the world's excellent group;while the fan angle is larger than the world's excellent group;when the board jumps,the board stretches before the transition,the ground reaction force is large,and the timing of the extension is relatively late.The extension is not sufficient.3.The angle of the knee joint of Huang Changzhou is less than that of the world's best group when the board is in the board,the maximum cushioning and the squatting.The absolute strength of the jumping leg is weak,which leads to poor knee support,cushioning and stretching.4.When Huang Changzhou takes off,the buffer part takes up a large proportion of the time of take-off,the proportion of the stretched part takes up the time of the jump,and the time of the jump leg is long,which causes the horizontal speed,vertical speed and angle of the rise to be small.