Quantitative research on the main influential kinematic parameters of male long jumpers' achievements - Based on the comparative analysis of Chinese and foreign elite athletes

By collecting the main kinematic parameters of some Chinese and foreign elite male long jumpers at take-off stage, using the mean analysis. sample T test, correlative analysis, factor analysis and principal component analysis, the intrinsic relationship between the performance and the main parameter of kinematics will be studied quantitatively. The results show that: the pedal speed, jumping vertical speed, jumping angle are closely related to the long jump achievement (P < 0.01); the initial jumping speed and rising levels of speed are at the first principal component factor, which reflect more than 91% information of the movement result; in weighting coefficient distribution, there is a big difference between the domestic and foreign players in the distance loss, initial jumping speed and jumping angle. Chinese athletes' effective distance utilization rate (ratio of measured results to real jump distance) is higher than that of foreign players, but their run-up speed and jumping angle were lower than the foreign athletes. Therefore, the key to raise our athletes' sports performance lies in further improving the run-up speed of our athletes, developing the athletes' leg strength, and enhancing the jumping ability and increasing the jumping angle, which aim at providing a theoretical reference for Chinese long jump training on a long term.