Kinematic factors associated with start performance in World-class male sprinters.
Kinematic factors associated with start performance in World-class male sprinters.
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与世界级男子短跑运动员起跑表现相关的运动因素。
DOI：
10.1016/j.jbiomech.2021.110554
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发表时间：
2021
影响因子：
2.4
通讯作者：
I. Bezodis
中科院分区：
文献类型：
--
作者：
J. Walker;A. Bissas;G. Paradisis;B. Hanley;Catherine B Tucker;N. Jongerius;Aaron Thomas;Hans C von Lieres Und Wilkau;Adam Brazil;Matthew A Wood;Stéphane Merlino;Pierre;I. Bezodis
其目的是调查2018年世界室内田径锦标赛上世界上最优秀的男性运动员在短跑初始加速阶段取得成功的运动学因素。在男子60米决赛中，8名短跑运动员拍摄了高速视频(150赫兹)。计算从设定位置到第一次接触后闭塞出口(GC1)结束时的时空和关节运动学变量。归一化平均水平外部功率(NAHEP)定义了表现，是一系列回归分析的因变量。GC1NAHEP与首次接触的10m时间、60m时间、速度变化、加速度和接触时间有明显的相关性(r分别为-0.74、-0.64、0.96、0.91和-0.56)。首次接触时关节运动学变量的逐步多元线性回归显示，躯干角和大腿分离角可解释GC1NAHEP近90%的变异(R2=0.89)。运动员起跳时躯干前倾、大腿分开的起跳投射具有良好的初始加速性能，对技术指导有很好的视觉指导作用。这是第一次在具有代表性的环境中采用世界级样本进行此类研究设计。未来的研究将在这种情况下结合详细的运动学和运动学数据捕获和分析，将进一步深入了解这项调查的结果。
The aim was to investigate the kinematic factors associated with successful performance in the initial acceleration phase of a sprint in the best male athletes in the World at the 2018 World Indoor Athletics Championships. High speed video (150 Hz) was captured for eight sprinters in the men’s 60 m final. Spatio-temporal and joint kinematic variables were calculated from the set position to the end of the first ground contact post-block exit (GC1). Normalised average horizontal external power (NAHEP) defined performance and was the dependent variable for a series of regression analyses. Clear relationships were found between GC1 NAHEP and 10-m time, 60-m time, change in velocity, acceleration and contact time in the first ground contact (r = –0.74, –0.64, 0.96, 0.91 and –0.56, respectively). Stepwise multiple linear regression of joint kinematic variables in the first ground contact revealed that trunk angle at take-off and thigh separation angle at take-off explained nearly 90% of variation in GC1 NAHEP (R2= 0.89). The athletes’ projection at take-off with a forward leaning trunk and large thigh separation is characteristic therefore of excellent initial acceleration performance and this will be a good visual guide for technical coaching instruction. This was the first study of its kind to adopt such a research design in a World-class sample in a representative environment. Future studies that combine detailed kinematic and kinetic data capture and analysis in such a setting will add further insight to the findings of this investigation.
区块启动时腰椎-骨盆-髋关节复合体的三维动力学函数
影响因子：
3.7
作者：
Sado Natsuki;Yoshioka Shinsuke;Fukashiro Senshi
通讯作者：
Fukashiro Senshi