Kinematics Research On Support Technique Of Chinese Elite Women’s 20km Race Walkers

In order to make China’s outstanding female race walking athletes achieve excellent sports performance in the world championships and reduce the penalty in the competition,reasonable support technology is particularly important,this paper takes the top six athletes of the 14 th National Games women’s 20 km race walking Yang Jiayu,Cheyang Shijie,Yang Liujing,Liu Hong,Ma Li,Li Maocuo as the research object,to the top six athletes of the 14 th National Games women’s 20 km race walking Yang Jiayu,Cheyang Shijie,Yang Liujing,Liu Hong,Ma Li,Li Maocuo’s competition technology as the test object,using literature method,measurement method,image analysis method,mathematical statistics method and other kinematic research on the supporting technology of six race walking athletes in China,the study shows that:(1)The landing angle of the six athletes in China is small overall,and the rear pedal angle is close to the world’s excellent value,but with the improvement of speed,the rear pedal angle has a tendency to develop in an unbalanced direction;Due to the short front support time and long conversion time,some athletes have insufficient tension of the thighs during the front swing,so that the center of gravity cannot be quickly followed,and the "arch" shape of the legs and torso is in front and the hips are behind.(2)From the perspective of the relationship between support and swing technology,the overall swing speed curve of the upper and lower limbs of the six athletes was not smooth enough,and the main reason was that the angle between the big and small arms and the swing angle of the big arm were small and unbalanced,resulting in tense upper and lower limb swing when walking at high speed,the swing speed curve was not smooth enough,and the swing technique was not stable enough when walking at low speed to high speed.(3)From the perspective of the relationship between support and liftoff,the vacancy time of China’s six athletes is in the vague range of vacancy realization,the vacancy time increases with the increase of walking speed,some athletes have the problem of unbalanced left and right leg vacancy time,the flight distance is shorter than that of foreign outstanding athletes,overall,the body center of gravity of China’s six outstanding athletes is well controlled up and down.(4)From the perspective of the relationship between step length and cadence,the step length and cadence of China’s outstanding female race walkers have increased in the process of walking from low speed to high speed.The increase in speed of Yang Jiayu,Yang Liujing,Ma Li and Li Maocuo mainly depends on the increase of step length and step frequency.The increase in speed of Sister Cheyang Shi and Liu Hong mainly depends on the increase in step length,and some athletes have the problem of unbalanced left and right single steps when walking at low high speed.