我国优秀男子10m跳台运动员练俊杰409C起跳技术运动学分析  

A Kinematic Analysis of the 409C Take-off Technique of Jun-jie LIAN, China's Outstanding Male 10m Platform Athlete

作　　者：王曦鸣 温宇红 张力文 孟凡戈 WANG Xi-ming;WEN Yu-hong;ZHANG Li-wen;MENG Fan-ge(China Swimming Academy,Beijing Sport University,Beijing 100084,China;School of Sports,Leisure and Tourism,Beijing Sport University,Beijing 100084,China;School of Sports Science,Beijing Sport University,Beijing 100084,China)

机构地区：[1]北京体育大学中国游泳运动学院,北京100084 [2]北京体育大学体育休闲与旅游学院,北京100084 [3]北京体育大学运动人体科学学院,北京100084

出　　处：《福建体育科技》2022年第1期44-52,共9页Fujian Sports Science and Technology

摘　　要：目的:分析练俊杰预赛和决赛两次409C高分动作与低分动作起跳技术的运动学参数差异。方法:通过二维定点定机摄像方法,采集练俊杰在2021年第十四届全运会跳水测试赛预赛和决赛的两次409C起跳技术的运动学据。通过Fastmove 3D Motion分析系统,对21个人体关节点进行逐帧标点解析,获得人体在二维空间内的坐标。结果:1)预跳阶段,背屈最大时刻,练俊杰重心垂直瞬时速度预赛大于决赛,差值为-0.07m/s;重心水平瞬时速度预赛大于决赛,差值为0.06m/s;重心垂直高度预赛小于决赛,差值为-0.03m,但水平距离预赛稍大于决赛,相差0.01m。身体姿态方面,除踝关节角预赛小于决赛之外(85.90°<92.54°),其余环节角度和躯干倾角预赛均大于决赛。2)起跳阶段,足尖离台时刻,练俊杰重心垂直瞬时速度预赛大于决赛,差值为0.19m/s;重心水平瞬时速度预赛小于决赛,差值为-0.12m/s;重心垂直高度预赛低于决赛,相差-0.03m;重心水平距离预赛大于决赛,差值为0.01m。此外,离台瞬间重心腾起角预赛大于决赛,相差2.28°。结论:1)练俊杰预赛起跳各个阶段身体姿态及重心水平速度好于决赛。2)练俊杰应进一步提高第二次跖屈最大时刻重心水平速度,在蹬伸离台时刻增加上肢"扣手"角速度速度,从而产生绕人体总重心的顺向转动,减小逆向动量矩的发生。Objective:To analyze the difference in kinematic parameters of the high-score and low-score 409C take-off techniques of Jun-jie LIAN in the preliminary and final.Methods:Kinematic data of Jun-jie LIAN's two 409C take-off techniques carried out in the preliminary and final diving competitions of the 14th National Games of the People’s Republic of China in 2021 were collected using a two-dimensional fixed-point camera.A punctuation analysis of 21 human body nodes was performed frame-by-frame with the Fastmove 3D Motion analysis system to obtain the coordinates of the human body in two-dimensional space.Results:In the pre-take-off stage,the moment of maximum dorsiflexion,the vertical instantaneous velocity of Junjie LIAN's center of gravity in the preliminary was greater than that in the final,with a difference of 0.07m/s.The horizontal instantaneous velocity of his center of gravity in the preliminary was larger than that in the final,and the difference was 0.06m/s.The vertical height of his center of gravity in the preliminary was smaller than that in the final with a difference of-0.03m,while his horizontal distance in the preliminary was slightly larger than that in the final with a difference of 0.01m.In terms of Jun-jie LIAN’s body posture,except for the ankle angle(85.90°<92.54°),the angle and torso inclination of other links in the preliminary round were all greater than those in the final.In the take-off stage,when the toe was off the platform,the vertical instantaneous velocity of Junjie LIAN's center of gravity was higher in the preliminary than in the final,with a difference of 0.19m/s.The horizontal instantaneous velocity of his center of gravity in the preliminary was less than that in the final,the difference was-0.12m/s.The vertical height of his center of gravity in the preliminary was lower than that in the final,the difference is-0.03m;The horizontal distance of his center of gravity in the preliminary was larger than that in the final with a difference of 0.01m.In addition,the center of gra

关 键 词：男子运动员 10m跳台 409C 起跳技术 二维运动学 练俊杰 

分 类 号：G861.21[文化科学—体育训练]