| Research purpose: In pole vaulting high school,run-up technique and take-off technique are important prerequisites for good achievement.This paper shows the running-up and take-off technical characteristics of these three athletes through the data of selected indexes.And to their run-up technology and take-off technology to make a technical evaluation,to provide the coaches with technical parameters,let the coaches guide athletes in the process of jumping to avoid failure as far as possible,to play their best state.This paper provides some suggestions for the training of reserve talents in pole vaulting and provides reference for the training and scientific research of pole vaulting in our country.Research objects and methods: taking the kinematics analysis of the last two steps running-up and taking-off techniques of the first three men pole vaulters in the 2018 National track and Field Champion and Grand Prix Finals as the research object,through the method of literature,plane fixed-point shooting method,Mathematical statistics method,video analysis method to carry on the analysis research.Results of the study:1.The run-up step difference of pole vaulter Zhang Wei is-0.18 m and-0.03 m respectively,and Yun Qiangjiu is 0.19 m and 0.25 m in the two vaults,and Yun Qiangjiu is 0.12 ms in the failure of the first jump,and the speed difference of the two vaults is-0.18 m and-0.03 m,respectively,while Yun Qiangjiu is 0.19 m and 0.25 m respectively.Han Yanguang has a two-hop velocity difference of 0.56m/s and 0.04 m ·m -1.There was also a high correlation between the difference of step size and the score（P < 0.01）.2.The correlation coefficient between the results of the three pole vaulters and their take-off time is-0.963.The take-off time of Zhang Wei and Han Yanguang’s failure in one-hop is 0.1.25 s and 0.115 s The take-off time of these three athletes is close to or even faster than that of the elite male pole vaulters in China.3.Zhang Wei failed to jump the landing angle is 63.9 °,pedal angle is 75.6 °.Yun Qiang-long failed to jump to the ground angle of 57.8 °,pedal angle of 79.3 °.The angle of trunk stem angle of the three athletes is less than 90 degrees,which is not up to the standard of the world’s elite athletes.Research conclusions:1.In the last two steps and take-off techniques of the top three athletes,there is a high negative correlation（r = 0.997）between the step size difference of the reverse two steps and the achievement,the horizontal velocity of the center of gravity has a high correlation with the achievement,and the speed difference is negatively correlated with the achievement.2.There was a high correlation between the indexes selected in this study and the achievement,and the most significant correlation in the take-off technique was the take-off time,the pedal angle,and the angle of the shoulder joint of the upper grip hand（P < 0.000）.3.There are significant differences between success and failure in step size a nd horizontal velocity of center of gravity,angle of landing and pedal,angle of elbow joint of handshake at take-off time,angle of pole chord.angle。 This proves that it is the instability of these technical actions that leads to failure.4.In comparison,Zhang Wei’s run-up one step is longer than two steps,is not conducive to active take-off;shoulder and elbow joints are too small,pole lifting is not sufficient;Yun Qiang-long run-up speed is fast,but the angle of the ground is too small,not conducive to rising up;Han Yanguang run-up speed is slow,take-off time is long,speed loss is too much,take-off is insufficient.Their torso angles are all less than 90 °,indicating that the takeoff point is too close and the lifting pole is insufficient. |
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