Kinematics Analysis Of The Distance Between The Last Two Step Approach And Takeoff Of Some Chinese Elite Male Vaulting

Objective:track and field sports in the pole vault movement is one of the most complex sports, is through the run-up acceleration generated by the kinetic energy through the body pole cavort ledger a competitive sport. Pole jump high school the last two steps to the takeoff of cohesion in the pole vault plays a very important role in the process, through to the second pole vault final step to take-off technology analysis, find out the problems and the insufficiency. As the research object in the future can improve the training to provide certain reference basis, on the scores increase after the pole vault has much space.Methods:this article USES the literature material method, experiment method, mathematical statistics and other research methods, in May 2014, the national grand prix held in kunshan, jiangsu province in the pole vault project approach the last two steps to the top two athletes take-off technology as the research object, USES the experimental testing method, shooting method, images from the scene of the game for planar point shooting athlete’s run-up in the last two steps to the process of take-off technology, the research object in the last two steps and take-off technology on resolving the relevant conclusions.Results:(1) through analysis of zhang wei and Yao Jie step length and 0.04 m from domestic outstanding man, (p< 0.05) without significant difference. (2) compared to the our country outstanding athletes zhang wei and Yao Jie leaps about 3 °Angle is small, that score, the better the show by leaps the smaller Angle, Angle of buckled up a= arctg (Vy/ag), in (p< 0.05), the difference has significant meaning. (3) the ankle angles zhang wei takeoff landing on an average of 119.11 °, average Yao Jie takeoff landing ankle Angle is 121.12 °. Zhang wei in the game’s ankle flexion and an average of 30.41 ° Yao Jie 33.33 °, p< 0.05) level have significant difference. (4) on the basis of an analysis of the shake hands arm under the shoulder joint and elbow in zhang wei’s shoulders shook hands on the arm Angle jump landing average 183.81 °, shook hands on the arm and Yao Jie takeoff landing average shoulder Angle is 184.15 °, the difference is significant. Athletes zhang wei at the end of the take-off leg touchdown average knee Angle is 176.67 °. Yao Jie athletes at the end of the take-off leg touchdown average knee Angle is 170.51 ° p< 0.05) was very significant difference. Conclusion:(1) zhang wei and Yao Jie last two steps to long run more reasonable and show the comparison step step length are less than the second countdown step by step. (2) zhang wei and Yao Jie jump leaps Angle is greater than the domestic outstanding sports, reflects the two athletes focus too jump up rather than upward jump forward. (3) athletes Yao Jie ankle Angle changes are bigger than zhang wei, zhang wei’s ankle angles is relatively reasonable, athletes ankle Angle can reflect the athletes last stretching to the size of the action is good enough, and finally the takeoff of the length of time. (4) Yao Jie touchdown knee Angle is small, easy to cause the knee joint buffer time is long, increase the takeoff time, is not conducive to the final jump. And zhang wei on average at 170 ° Angle of knee above, to speed up the takeoff of the stretching.