Kinematics Analysis Of Top Male High Jumpers In The Stage Of Run-up And Take-off

Research proposal: To explore the technical characteristics of the top eight athletes in the men's high jump finals of the 13 th National Games in China,and to compare the differences between the eight high jumpers and the world's top jumpers in the two-step run-up and take-off techniques.Research method: Place two cameras on the front and front sides with the high jump mat.Shooting and analyzing the top eight players in the men's high jump finals of the 13 th National Games in the aspect of kinematics,and the Zatsiorlky human body model was used for data processing.At the same time,the video was synthesized and analyzed by the video system.Research results: The results of the obtained kinematic parameters show that there is a certain gap in the technical parameters between the eight high jumpers in China and the world elite high jumpers.Research conclusions: 1.In terms of the backward two-step speed,the domestic eight high jumpers' backward one-step and two-step approach horizontal speed is obviously slower than that of the world's excellent high jumpers.Qiao Yuefeng and Huang Longkang's backward onestep horizontal speed is lower than the average,while Bailong and Yu Shi Lock's backward one-step horizontal speed is obviously faster than the average.2.In the last two steps,except Sun Zhao,the difference between the last two steps is not within the average of the world's elite high jumpers.The step length of Wang Chen and Yu Shi Lock is bigger than that of the other two steps.As for the height of the center of mass,Qiao Yuefeng's height of the center of mass is obviously higher than that of other players,while Wang Chen and Sun Zhao's height of the center of mass is slightly lower than that of others.3.In terms of vertical speed at the beginning of takeoff,the eight athletes are obviously lower than the world's top high jumpers.At the beginning of takeoff,the ratio of the height of the center of mass to the height of the eight athletes is obviously lower than that of the world's elite athletes.4.In terms of the introversion angle at the beginning of takeoff,there are obvious differences between the mean value of the introversion angle at the beginning of takeoff of the eight athletes in China and that of the world's elite high jumpers.There is a gap between the overall level of the change of the backward angle of the eight Chinese athletes and the world's Elite High Jumpers in the take-off process.5.In terms of the left knee angle of the moment when the takeoff foot touches the ground,the eight Chinese athletes are within the average range of the world's elite high jumpers.In the aspect of hip joint angle,the average values of Yushi lock,Bailong,Zhang Guowei,Qiao Yuefeng and left hip angle are smaller than those of the world's elite high jumpers.The average values of left hip angle of the eight athletes are smaller than those of the world's elite high jumpers when they take off and land.6.In the aspect of thigh angle at the moment of takeoff foot landing,Qiao Yuefeng,Zhang Guowei,Wang Chen and Yu Shi lock's thigh angle at the moment of takeoff foot landing is obviously larger than the average of the world's elite high jumpers.In terms of the angle between the thighs at the moment of takeoff,Zhang Guowei's angle between the thighs at the moment of takeoff is obviously higher than the average of eight people,while Wang Chen and Bailong's angle between the thighs at the moment of takeoff is lower than the average of the eight people.