a Sports Performance Research Institute New Zealand (SPRINZ) , Auckland University of Technology , Auckland , New Zealand.
b High Performance Sport New Zealand , Auckland , New Zealand.
Sports Biomech. 2019 Feb;18(1):88-99. doi: 10.1080/14763141.2017.1386707. Epub 2017 Nov 10.
Radar technology can be used to perform horizontal force-velocity-power profiling during sprint-running. The aim of this study was to determine the reliability of radar-derived profiling results from short sprint accelerations. Twenty-seven participants completed three 30 m sprints (intra-day analysis), and nine participants completed the testing session on four separate days (inter-day analysis). The majority of radar-derived kinematic and kinetic descriptors of short sprint performance had acceptable intra-day and inter-day reliability [intraclass correlation coefficient (ICC) ≥ 0.75 and coefficient of variation (CV) ≤ 10%], but split times over the initial 10 m and some variables that include a horizontal force component had only moderate relative reliability (ICC = 0.49-0.74). Comparing the average of two sprint trials between days resulted in acceptable reliability for all variables except the relative slope of the force-velocity relationship (S ; ICC = 0.74). Practitioners should average sprint test results over at least two trials to reduce measurement variability, particularly for outcome variables with a horizontal force component and for sprint distances of less than 10 m from the start.
雷达技术可用于在短跑中进行水平力-速度-功率分析。本研究旨在确定短距离冲刺加速过程中雷达衍生剖面结果的可靠性。27 名参与者完成了三次 30 米短跑（日内分析），9 名参与者在四天内完成了测试（日间分析）。大多数短距离冲刺表现的雷达衍生运动学和动力学描述符具有可接受的日内和日间可靠性[组内相关系数（ICC）≥0.75 和变异系数（CV）≤10%]，但初始 10 米的分段时间和一些包含水平力分量的变量只有中等相对可靠性（ICC=0.49-0.74）。比较两天内两次冲刺试验的平均值，除了力-速度关系的相对斜率（S）外，所有变量的可靠性均可接受（ICC=0.74）。从业者应至少对两次冲刺测试结果进行平均，以减少测量变异性，特别是对于具有水平力分量的结果变量和距离起点小于 10 米的冲刺距离。
