CAJ | 학술논문

研究李金哲在2014年北京国际田径挑战赛中的关键运动技术参数表现。1）李金哲在本次比赛中6次试跳的真实成绩为8.26±0.13m;6次试跳最后2步的平均速度为10.72±0.09 m/s;6次试跳最大速度平均值达到11.08±0.10 m/s;助跑最大速度达到11.20m/s。2）6次试跳倒2步步长平均值为2.42±0.08 m,倒1步步长平均值为2.39±0.07m,与世界级优秀运动员相比,倒1步步长与世界级优秀运动员之间的差异显著性较大（P〈0.001）,而倒2步步长无显著性差异（P〉0.05）。3）6次试跳犯规频次占总试跳的50%,踏板精度平均为5.50±13.56cm,踏板的稳定性差。4）踏板瞬间的平均速度为10.36±0.13m/s,起跳瞬间的水平速度平均值为9.56±0.11m/s,起跳瞬间垂直速度平均值为3.35±0.21m/s。5）起跳角度平均值为19.50°±1.22°,最大值为21°,最小值为18°,显著性小于世界级优秀运动员（P〈0.05）。6）起跳腿膝关节在踏板瞬间的角度平均值为154.38°±7.75°,在身体直立瞬间为158.08°±6.53°,在起跳瞬间为157.55°±4.25°,与世界级优秀运动员相同。7）身体质心最低点发生在倒1步腾空阶段,平均值为0.92±0.01 m。踏板瞬间身体质心高度平均值为0.96±0.02m,离板瞬间身体质心高度平均值为1.13±0.05m。李金哲在本次比赛中助跑最大速度能力、后2步助跑平均速度能力、踏板速度和起跳速度能力、助跑和起跳瞬间起跳腿、摆动腿的角度均达到或超过世界级优秀运动员的水平,这是李金哲跳远成绩优秀的决定因素。但相比而言,李金哲助跑倒1步步长较大,踏板精度较差,起跳垂直速度较低并导致起跳角度偏小,这是李金哲今后改进和提高个人运动技术应注意的重要问题。
연구리금철재2014년북경국제전경도전새중적관건운동기술삼수표현。1）리금철재본차비새중6차시도적진실성적위8.26±0.13m;6차시도최후2보적평균속도위10.72±0.09 m/s;6차시도최대속도평균치체도11.08±0.10 m/s;조포최대속도체도11.20m/s。2）6차시도도2보보장평균치위2.42±0.08 m,도1보보장평균치위2.39±0.07m,여세계급우수운동원상비,도1보보장여세계급우수운동원지간적차이현저성교대（P〈0.001）,이도2보보장무현저성차이（P〉0.05）。3）6차시도범규빈차점총시도적50%,답판정도평균위5.50±13.56cm,답판적은정성차。4）답판순간적평균속도위10.36±0.13m/s,기도순간적수평속도평균치위9.56±0.11m/s,기도순간수직속도평균치위3.35±0.21m/s。5）기도각도평균치위19.50°±1.22°,최대치위21°,최소치위18°,현저성소우세계급우수운동원（P〈0.05）。6）기도퇴슬관절재답판순간적각도평균치위154.38°±7.75°,재신체직립순간위158.08°±6.53°,재기도순간위157.55°±4.25°,여세계급우수운동원상동。7）신체질심최저점발생재도1보등공계단,평균치위0.92±0.01 m。답판순간신체질심고도평균치위0.96±0.02m,리판순간신체질심고도평균치위1.13±0.05m。리금철재본차비새중조포최대속도능력、후2보조포평균속도능력、답판속도화기도속도능력、조포화기도순간기도퇴、파동퇴적각도균체도혹초과세계급우수운동원적수평,저시리금철도원성적우수적결정인소。단상비이언,리금철조포도1보보장교대,답판정도교차,기도수직속도교저병도치기도각도편소,저시리금철금후개진화제고개인운동기술응주의적중요문제。
This paper studied the key technique parameters of LI Jin-zhe who took part in the competition in IAAF world challenge in China Beijing in 2014.The result showed that 1）LI Jin-zhe got his average distance value of 6attempts reality result was 8.26±0.13m;the last two strides average speed value of his 6attempts was 10.72±0.09m/s;it is significant difference between his speed and the current world-class＇（P〈0.01）;and his approach maximum speed average value of 6attempts was 11.08±0.10m/s;His approach maximum speed was 11.20m/s;2）His 2-last strides＇ average value was 2.42±0.08 m,and his 1-last strides＇ average value was 2.39±0.07 m,there wasn＇t significant difference between these two strides.But the 1-last stride was smaller than the world-class＇ s（P〈0.001）.3）there were three times falling to touch down board in 6attempts,its proportion was 50%,his touching down board was too bad.4）The average value velocity of the touch-board instant of his 6attempts was 10.36±0.13m/s,and the average value horizontal velocity of the take-off instant of his 6attempts was 9.56±0.11m/s,and the average value vertical velocity of the take-off instant of his 6attempts was 3.35±0.21m/s.these data were same as the worldclass athletes,and no significant difference between he and the current world-class＇ average value.5）The average value of take-off angle of his 6attempts was 19.50°±1.22°,the maximum value of take-off angle was 21°,and the minimum of take-off angle was 18°,it is significant difference lower than the current world-class athletes（P〈0.05）.6）The average value of take-off leg in touch-down instant was 154.38°±7.75°,and the average value of take-off leg in upright instant was158.08±6.53？,and the average value of take-off leg in take-off instant was 174.38°±7.75°.these data were same as the world-class level.7）The lowest average value of CM height was 0.92±0.01 m during the 1-last stride;the average value of CM92 height was 0.96±0.02 m in the touch-down board instant,and the average value of CM height was 1.13±0.05 min the take-off instant.Conclusion：LI Jin-zhe is one of the best man＇s long jumper in the world,his long jump ability arrived the top level in the world in this year.His maximum approach speed,and the average velocity value of the last two stride,and the speed in the touch-down instant,and the speed in the take-off instant were one of the best and fastest of the world-class level.and his lead leg and take-off leg technique were same good as the world-class.These are good technique abilities for him.but his take-off angle was lower than the world-class,and his touch-down board ability was not accuracy,and his 1-last stride was much longer than the world-class,and he should low his CM height during the 1-last stride.If he could improve his technique,he must get the better result in the future.