Recent evidence suggests previously concussed athletes are at greater risk for lower-extremity (LE) injuries than are controls. However, little is known regarding the influence of sports-related concussion (SRC) on landing biomechanics that may provide a mechanistic rationale for LE injury risk. The purpose of this investigation was to examine LE drop-landing biomechanics in adolescent athletes with and without a previous SRC history. Participants included 10 adolescent athletes with an SRC history and 11 controls from multiple sports. Three-dimensional kinematic and kinetic data associated with LE injury risk were analyzed across 5 trials for 30- and 60-cm landing heights. Multivariate analyses indicated group differences in landing patterns from the 30- (P = .041) and 60-cm (P = .015) landing heights. Follow-up analyses indicated that concussed adolescent athletes demonstrated significantly less ankle dorsiflexion and knee flexion versus controls when performing drop landings. Our findings suggest that previously concussed adolescent athletes complete drop-landing maneuvers with ankle and knee joint kinematic patterns that suggest greater risk for LE injury. While limitations such as sport variety and explicit LE injury history are present, the results of this study provide a possible biomechanical rationale for the association between SRC and LE injury risk.

最近的证据表明，以前患有脑震荡的运动员比对照组的运动员发生下肢（LE）损伤的风险更大。然而，人们对运动相关脑震荡 (SRC) 对着陆生物力学的影响知之甚少，而这可能为 LE 损伤风险提供机械原理。这项调查的目的是检查有或没有 SRC 历史的青少年运动员的 LE 落地生物力学。参与者包括 10 名有 SRC 历史的青少年运动员和 11 名来自多种运动项目的对照组。在 30 厘米和 60 厘米着陆高度的 5 项试验中，分析了与 LE 损伤风险相关的三维运动学和动力学数据。多变量分析表明，30 厘米 ( P  = .041) 和 60 厘米 ( P  = .015) 着陆高度的着陆模式存在群体差异。后续分析表明，与对照组相比，患有脑震荡的青少年运动员在落地时表现出明显较少的踝背屈和膝屈。我们的研究结果表明，以前患有脑震荡的青少年运动员在完成落地动作时踝关节和膝关节的运动模式表明 LE 损伤的风险更大。虽然存在运动多样性和明确的 LE 损伤史等限制，但本研究的结果为 SRC 和 LE 损伤风险之间的关联提供了可能的生物力学原理。