Willy Taillard Laboratory of Kinesiology, Geneva University Hospitals, Geneva, Switzerland.
Gait Posture. 2012 May;36(1):68-72. doi: 10.1016/j.gaitpost.2012.01.005. Epub 2012 Feb 9.
This study investigated the full-body strategies utilized during a sit-to-stand (STS) task in patients with knee osteoarthritis (OA) and the association between STS alterations and clinical measurements. Twenty-five patients with advanced knee OA and twenty healthy elderly adults were recruited to participate in this study. Patients were asked to stand up from a chair four times without using their arms. A 3D motion analysis system was used to capture the full-body kinematics during the task. Two force plates were used to capture the forces under each leg. The following parameters were investigated in the knee OA group and compared with the control group: the time to realize STS, the force ratio between both limbs, the knee and hip kinetics and the trunk kinematics. The pain and functional capacity were obtained from the WOMAC. The results showed that patients with knee OA put 10% additional weight on the contralateral side when compared with the symmetrical strategy of the control group. Patients with knee OA showed a significantly lower knee flexion moment (0.51 Nm/kg vs. 0.72 Nm/kg), a higher maximal trunk flexion (46.4° vs. 37.5°), and a higher lateral trunk lean on the contralateral side (2.4° vs. 0.9°) when compared with the control group. The main correlations were found between pain and the averaged time to complete the STS task (r=0.55). With the quantification of the full-body mechanisms utilized during the STS task, which includes both distal and proximal compensations, our study brings new insights, leading to a better understanding of the functional alterations in patients with advanced knee OA.
本研究调查了膝骨关节炎（OA）患者在坐站（STS）任务中使用的全身策略，以及 STS 改变与临床测量之间的关系。招募了 25 名患有晚期膝骨关节炎的患者和 20 名健康的老年人参加这项研究。患者被要求从椅子上不使用手臂四次站起来。使用 3D 运动分析系统捕捉任务过程中的全身运动学。使用两个测力板捕捉每条腿下的力。在膝骨关节炎组中研究了以下参数，并与对照组进行了比较：实现 STS 的时间、双腿之间的力比、膝关节和髋关节动力学以及躯干运动学。从 WOMAC 获得疼痛和功能能力。结果表明，与对照组的对称策略相比，膝骨关节炎患者在对侧施加了 10%的额外重量。与对照组相比，膝骨关节炎患者的膝关节屈曲力矩明显降低（0.51 Nm/kg 对 0.72 Nm/kg），最大躯干屈曲度更高（46.4°对 37.5°），对侧躯干倾斜度更高（2.4°对 0.9°）。疼痛与完成 STS 任务的平均时间之间存在主要相关性（r=0.55）。通过量化 STS 任务中使用的全身机制，包括远端和近端补偿，我们的研究提供了新的见解，从而更好地理解了晚期膝骨关节炎患者的功能改变。
