The purpose of the study was to compare the tibiofemoral contact forces of participants with chronic ankle instability versus controls during landings using a computer-simulated musculoskeletal model. A total of 21 female participants with chronic ankle instability and 21 pair-matched controls performed a drop landing task on a tilted force plate. A 7-camera motion capture system and 2 force plates were used to test participants' lower-extremity biomechanics. A musculoskeletal model was used to calculate the tibiofemoral contact forces (femur on tibia). No significant between-group differences were observed for the peak tibiofemoral contact forces (P = .25-.48) during the landing phase based on paired t tests. The group differences ranged from 0.05 to 0.58 body weight (BW). Most participants demonstrated a posterior force (peak, ∼1.1 BW) for most duration of the landing phase and a medial force (peak, ∼0.9 BW) and large compressive force (peak, ∼10 BW) in the landing phase. The authors conclude that chronic ankle instability may not be related to the increased tibiofemoral contact forces or knee injury mechanisms during landings on the tilted surface.

中文翻译：

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使用肌肉骨骼模型在降落过程中，慢性踝关节不稳定不会影响胫股接触力。

该研究的目的是使用计算机模拟的肌肉骨骼模型比较慢性踝关节不稳定参与者与对照组在着陆期间的胫股接触力。共有 21 名患有慢性踝关节不稳的女性参与者和 21 名配对对照者在倾斜的测力板上执行了降落任务。使用 7 个摄像头动作捕捉系统和 2 个测力台来测试参与者的下肢生物力学。使用肌肉骨骼模型来计算胫股接触力（胫骨上的股骨）。根据配对 t 检验，在着陆阶段的峰值胫股接触力 (P = .25-.48) 未观察到显着的组间差异。组间差异范围为 0.05 至 0.58 体重 (BW)。大多数参与者表现出后向力（峰值，~1。1 BW）在着陆阶段的大部分时间内，中间力（峰值，~0.9 BW）和大压缩力（峰值，~10 BW）在着陆阶段。作者得出结论，慢性踝关节不稳定可能与在倾斜表面着陆时增加的胫股接触力或膝关节损伤机制无关。