Faculty of Sport and Physical Education, University of Belgrade, Belgrade, Serbia.
Comput Methods Biomech Biomed Engin. 2024 Jan-Mar;27(2):145-155. doi: 10.1080/10255842.2023.2170713. Epub 2023 Jan 28.
Short sprints are most frequently evaluated and modeled using timing gates. Flying start distance is often recommended to avoid premature timing system triggering by lifting knees or swinging arms. This results in timing system initiation not being aligned with the initial force application, which yields bias in estimated short sprint parameters. This simulation study aims to explore the effects of the flying start distance on bias and sensitivity to detect changes in short sprint parameters using three models: the contemporary No Correction model and two proposed Estimated time correction (Estimated TC), and Estimated flying distance (Estimated FD) models. In conclusion, both the Estimated TC and Estimated FD models provided more precise parameter estimates, but surprisingly, the No correction model provided higher sensitivity for specific parameter changes. Besides standardizing the sprint starting technique for the short sprint performance monitoring, practitioners are recommended to utilize and track the results of all three models.
短距离冲刺最常通过计时门进行评估和建模。为避免因提膝或摆臂过早触发计时系统，通常建议采用起跑飞行距离。这会导致计时系统的启动与初始力的施加不同步，从而导致估计的短距离冲刺参数产生偏差。本模拟研究旨在探讨起跑飞行距离对使用三种模型（即当代无修正模型和两个提议的估计时间修正（Estimated TC）和估计飞行距离（Estimated FD）模型）检测短距离冲刺参数变化的偏差和敏感性的影响。总之，Estimated TC 和 Estimated FD 两个模型都提供了更精确的参数估计，但令人惊讶的是，对于特定参数变化，无修正模型提供了更高的敏感性。除了规范短距离冲刺表现监测的起跑技术外，建议从业者利用和跟踪所有三个模型的结果。
