Choice of sprint start performance measure affects the performance-based ranking within a group of sprinters: which is the most appropriate measure?
Choice of sprint start performance measure affects the performance-based ranking within a group of sprinters: which is the most appropriate measure?
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DOI：
10.1080/14763141.2010.538713
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发表时间：
2010-01-01
影响因子：
2.2
通讯作者：
Trewartha, Grant
中科院分区：
文献类型：
--
作者：
Bezodis, Neil E.;Salo, Aki I. T.;Trewartha, Grant
短跑起步表现以前已经用几种不同的方法进行了量化。本研究的目的是确定不同的措施是否会影响基于性能的排名在一组12名短跑运动员，如果是这样的话，以确定最合适的措施。10个性能指标中没有一个对所有短跑运动员进行相同顺序的排名;斯皮尔曼的rho相关性在不同的块阶段措施之间的范围从0.50到0.94，块阶段措施和块退出后获得的从0.66到0.85。基于对每种措施量化的考虑，归一化平均水平外部功率被确定为最合适的，包括块速度和产生该速度所花费的时间。根据测力平台标准数据，评估了在外部有效场设置中获得这些数据的准确性。对于产生678 +/- 40 W块功率的运动员，仔细设置的手动高速视频分析协议分别产生+5 W和+/- 24 W的系统误差和随机误差。由于性能指标的选择可能会影响从技术分析中得出的结论，例如干预的成功，因此建议使用外部电源来量化启动性能。
Sprint start performance has previously been quantified using several different measures. This study aimed to identify whether different measures could influence the performance-based ranking within a group of 12 sprinters, and if so, to identify the most appropriate measure. None of the 10 performance measures ranked all sprinters in the same order; Spearman's rho correlations between different block phase measures ranged from 0.50 to 0.94, and between block phase measures and those obtained beyond block exit from 0.66 to 0.85. Based on the consideration of what each measure quantifies, normalised average horizontal external power was identified as the most appropriate, incorporating both block velocity and the time spent producing this velocity. The accuracy with which these data could be obtained in an externally valid field setting was assessed against force platform criterion data. For an athlete producing 678 +/- 40 W of block power, a carefully set-up manual high-speed video analysis protocol produced systematic and random errors of +5 W and +/- 24 W, respectively. Since the choice of performance measure could affect the conclusions drawn from a technique analysis, for example the success of an intervention, it is proposed that external power is used to quantify start performance.