Xu Jiaming, Wen Zhishen, Augustine Sylvia, Sharir Raihana, De Bleecker Camilla, Robinson Mark A, Jamkrajang Parunchaya, Smeets Annemie, Vanrenterghem Jos
Department of Rehabilitation Sciences, KU Leuven, Leuven, Belgium.
Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, UK.
J Sports Sci. 2025 Aug 4:1-15. doi: 10.1080/02640414.2025.2541490.
Evaluating movement quality in dynamic tasks is vital in return-to-sport (RTS) decision-making, yet marker-based motion capture (MoCap) can be complex. This study assessed the inter-session reliability of lower extremity joint kinematics and kinetics obtained using Theia3D, a markerless MoCap solution, during dynamic RTS screening tasks. Eighteen healthy participants performed six tasks over two sessions. Joint kinematics and kinetics were evaluated for absolute reliability between sessions, for discrete values and time-varying profiles. Test-retest reliability was evaluated using (integrated) intraclass correlation coefficient (ICC), standard error of measurement (SEM), and minimal detectable change (MDC). With few exceptions, integrated ICC values of joint angular displacements and moments showed moderate-to-excellent reliability (0.61-0.86 and 0.62-0.90 for angles in the sagittal and frontal plane, respectively; 0.54-0.88 and 0.51-0.85 for moments). SEM values for joint angles were low, indicating minimal session-to-session variation for kinematics. However, most MDC values were relatively high compared to expected intervention effects, particularly showing that kinetic measurements may not yet accurately detect clinically meaningful changes. Overall, these findings thus support the markerless MoCap's potential for tracking lower extremity dynamics during RTS screening, particularly for kinematics and sagittal plane kinetics, but highlight limited inter-session reliability for frontal plane kinetic parameters at the hip and ankle.
评估动态任务中的运动质量在重返运动（RTS）决策中至关重要，但基于标记的运动捕捉（MoCap）可能很复杂。本研究评估了在动态RTS筛查任务期间，使用无标记MoCap解决方案Theia3D获得的下肢关节运动学和动力学的组间可靠性。18名健康参与者在两个阶段完成了六项任务。对关节运动学和动力学进行了评估，以确定各阶段之间对于离散值和随时间变化的曲线的绝对可靠性。使用（综合）组内相关系数（ICC）、测量标准误差（SEM）和最小可检测变化（MDC）评估重测可靠性。除少数例外情况外，关节角位移和力矩的综合ICC值显示出中等到优秀的可靠性（矢状面和额状面角度的ICC值分别为0.61 - 0.86和0.62 - 0.90；力矩的ICC值为0.54 - 0.88和0.51 - 0.85）。关节角度的SEM值较低，表明运动学方面各阶段之间的变化最小。然而，与预期的干预效果相比，大多数MDC值相对较高，尤其表明动力学测量可能尚未准确检测到具有临床意义的变化。总体而言，这些发现支持了无标记MoCap在RTS筛查期间跟踪下肢动力学的潜力，特别是对于运动学和矢状面动力学，但突出了髋部和踝部额状面动力学参数的组间可靠性有限。
