The purpose of the present study was to compare landing mechanics between the stop jump (SJ) and drop vertical jump (DVJ) and to compare sex-based differences in landing mechanics between tasks. 50 healthy recreational athletes were recruited and each participant completed seven SJs and seven DVJs. Peak knee flexion and abduction angle, knee flexion and ab/adduction range of motion (ROM), peak vertical and posterior ground reaction force (GRF), peak internal knee extension and knee adduction moment were computed for the dominant limb during the first landing of both tasks. A two-way ANOVA was used to determine the effects of and interactions between sex (men vs women) and task (SJ vs DVJ) for each outcome. There was an interaction for peak vertical GRF (p = 0.024), knee flexion ROM (p = 0.027), knee ab/adduction ROM (p = 0.047), and peak knee flexion (p = 0.034) and adduction (p = 0.012) moment. The SJ resulted in smaller vertical GRFs, larger posterior GRFs, and larger peak internal knee adduction moments relative to the DVJ (all p < 0.002). Women landed with larger peak knee abduction angles, larger internal knee adduction moments, and smaller knee extension moments relative to men (p = 0.001-0.026). Overall, as the SJ resulted in larger posterior GRFs and internal knee adduction moments, this task produced movements which resemble most anterior cruciate ligament (ACL) injuries and are risk factors for ACL injuries. As the SJ produced more sex-based differences, it may be better suited than the DVJ for ACL injury risk screening. This study therefore stressed the importance of selecting an appropriate landing task for ACL injury prevention research and clinical return to sport assessment.

中文翻译：

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着陆机制中基于性别的差异在跌落垂直跳跃和停止跳跃之间有所不同。

本研究的目的是比较停止跳跃（SJ）和下降垂直跳跃（DVJ）之间的着陆机理，并比较任务之间着陆机理中基于性别的差异。招募了50名健康的休闲运动员，每个参与者完成了7名SJ和7名DVJ。在首次降落过程中，计算优势肢的膝盖屈曲和外展角度峰值，膝盖屈曲和运动的绝对/内收范围（ROM），垂直和后地面反作用力峰值（GRF），内部最大膝关节伸展和膝盖内收力矩。两项任务。对于每个结局，使用双向ANOVA来确定性别（男人对女人）和任务（SJ对DVJ）的影响以及交互作用。峰值垂直GRF（p = 0.024），膝盖屈曲ROM（p = 0.027），膝盖ab /内收ROM（p = 0.047），膝关节屈曲峰值（p = 0.034）和内收力矩（p = 0.012）。与DVJ相比，SJ导致了较小的垂直GRF，较大的后GRF和较大的内膝峰内收弯矩（所有p <0.002）。与男性相比，女性着陆时膝关节外展峰值角度更大，内部膝关节内收力矩更大，膝关节伸展力矩更小（p = 0.001-0.026）。总体而言，由于SJ导致较大的后GRF和内部膝盖内收力矩，因此该任务产生的运动类似于大多数前交叉韧带（ACL）损伤，并且是ACL损伤的危险因素。随着SJ产生更多基于性别的差异，它可能比DVJ更适合ACL损伤风险筛查。