ArticleJournal of experimental orthopaedics2026
Muscle fatigue affects dynamic tibiofemoral movements during jumping tasks in healthy participants.
Article in Journal of experimental orthopaedics, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Purpose: The main function of the anterior cruciate ligament (ACL) is to restrain anterior tibia translation (ATT) and internal tibia rotation (ITR) relative to the femur. Muscle fatigue has been identified as a potential risk factor for ACL injury due to its negative effects on neuromuscular control, proprioception, and joint stability. The aim of this study was to determine the influence of muscle fatigue on dynamic ATT (ATTd) and dynamic ITR (ITRd) during the single-leg hop for distance (SLHD) and side hop (SH) in healthy participants. Methods: Twenty healthy participants were included. ATTd, ITRd and knee flexion angle were assessed during the SLHD and SH using a 3D motion capture system in a nonfatigued and fatigued condition. Fatigue was induced by 30 s of squat jumps before each task. ATTd, ITRd and knee flexion angle were analysed using statistical parametric mapping (SPM) to compare conditions, from initial contact (IC) to 0.75 s after IC. Results: During the fatigued condition, a significant increase in ATTd was observed for both the SLHD ( Conclusion: Muscle fatigue resulted in increased ATTd, offering new insights into intra-articular knee kinematics in fatigued conditions. The observed changes were not multiplanar and did not match timing typically associated with ACL injury mechanisms, leaving the relevance to injury risk unclear. Level of Evidence: Level II.
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