Vescovi Jason D, Jovanović Mladen
Faculty of Kinesiology and Physical Education, Graduate School of Exercise Science, University of Toronto, Toronto, ON, Canada.
Faculty of Sport and Physical Education, University of Belgrade, Belgrade, Serbia.
Front Sports Act Living. 2021 May 28;3:629694. doi: 10.3389/fspor.2021.629694. eCollection 2021.
The purpose of this study was to compare model estimates of linear sprint mechanical characteristics using timing gates with and without time correction. High-level female soccer players ( = 116) were evaluated on a 35-m linear sprint with splits at 5, 10, 20, 30, and 35 m. A mono-exponential function was used to model sprint mechanical metrics in three ways: without a time correction, with a fixed (+0.3 s) time correction, and with an estimated time correction. Separate repeated-measures ANOVAs compared the sprint parameter estimates between models and also the residuals between models. Differences were identified between all modeled sprint mechanical metrics; however, comparable estimates to the literature occurred when either time correction was used. Bias for both time-corrected models was reduced across all sprint distances compared to the uncorrected model. This study confirms that a time correction is warranted when using timing gates at the start line to model sprint mechanical metrics. However, determining whether fixed or estimated time corrections provide greater accuracy requires further investigation.
本研究的目的是比较使用有时间校正和无时间校正的计时门对直线冲刺力学特征的模型估计。116名高水平女子足球运动员在35米直线冲刺中接受评估，在5米、10米、20米、30米和35米处设有分段计时。使用单指数函数以三种方式对冲刺力学指标进行建模：无时间校正、固定（+0.3秒）时间校正和估计时间校正。分别进行重复测量方差分析，比较各模型之间的冲刺参数估计以及模型之间的残差。所有建模的冲刺力学指标之间均存在差异；然而，使用任何一种时间校正时，与文献中的估计值具有可比性。与未校正模型相比，两种时间校正模型在所有冲刺距离上的偏差均有所降低。本研究证实，在使用起跑线处的计时门对冲刺力学指标进行建模时，进行时间校正是必要的。然而，确定固定时间校正还是估计时间校正能提供更高的准确性需要进一步研究。
