Wade Logan, Needham Laurie, McGuigan M Polly, Bilzon James L J
Department for Health, University of Bath, Bath, UK.
Centre for Analysis of Motion, Entertainment Research and Applications, University of Bath, Bath, UK.
J Sports Sci. 2022 May;40(10):1191-1197. doi: 10.1080/02640414.2022.2059319. Epub 2022 Mar 31.
The backward double integration method uses one force plate and could calculate jump height for countermovement jumping, squat jumping and drop jumping by analysing the landing phase instead of the push-off phase. This study compared the accuracy and variability of the forward double integration (FDI), backwards double integration (BDI) and Flight Time + Constant (FT+C) methods, against the marker-based rigid-body modelling method. It was hypothesised that the jump height calculated using the BDI method would be equivalent to the FDI method, while the FT+C method would have reduced accuracy and increased variability during sub-maximal jumping compared to maximal jumping. Twenty-four volunteers performed five maximal and five sub-maximal countermovement jumps, while force plate and motion capture data were collected. The BDI method calculated equivalent mean jump heights compared to the FDI method, with only slightly higher variability (2-3 mm), and therefore can be used in situations where FDI cannot be employed. The FT+C method was able to account for reduced heel-lift distance, despite employing an anthropometrically scaled heel-lift constant. However, across both sub-maximal and maximal jumping, it had increased variability (1.1 cm) compared to FDI and BDI and should not be used when alternate methods are available.
反向双积分法使用一个测力台，通过分析着地阶段而非蹬地阶段来计算反向纵跳、深蹲跳和下落跳的跳跃高度。本研究将正向双积分（FDI）、反向双积分（BDI）和飞行时间+常数（FT+C）法的准确性和变异性与基于标记的刚体建模法进行了比较。研究假设，使用BDI法计算的跳跃高度将与FDI法相当，而与最大跳跃相比，FT+C法在次最大跳跃期间的准确性会降低且变异性会增加。24名志愿者进行了五次最大和五次次最大反向纵跳，同时收集了测力台和动作捕捉数据。与FDI法相比，BDI法计算出的平均跳跃高度相当，变异性仅略高（2-3毫米），因此可用于无法采用FDI法的情况。尽管采用了根据人体测量学缩放的足跟抬起常数，但FT+C法能够考虑到足跟抬起距离的减小。然而，在次最大和最大跳跃中，与FDI和BDI相比，它的变异性增加了（1.1厘米），当有其他方法可用时不应使用。
