Loss of sagittal plane hip range of motion (ROM) is a commonly reported walking gait impairment in people with hip osteoarthritis (OA). The purpose of this study was to evaluate whether sagittal plane hip ROM reduction and the resulting altered sagittal plane ankle kinetics during gait influence the energy cost of walking in people with hip OA. We evaluated 24 women with unilateral hip OA (60 ± 9.1 years; 29.4 ± 6.1 kg/m²). Sagittal plane hip ROM and peak ankle dorsiflexion moment were assessed by instrumented gait analysis. We also used a portable metabolic system to measure the energy cost of walking. Pearson correlations and regression analyses were performed to test our hypotheses. We found that greater involved limb sagittal plane hip ROM was associated with a larger ankle peak dorsiflexion moment at push-off during gait (R = 0.50, p = 0.01). Greater involved limb peak ankle dorsiflexion moment at push-off was associated with a lower oxygen consumption during gait (R = −0.51, p = 0.01). Involved limb peak ankle dorsiflexion moment at push-off predicted 26% of the variance in O₂ cost. Statement of Clinical Significance: Sagittal plane hip ROM was associated with peak ankle dorsiflexion moment at push-off during gait in women with hip OA. Moreover, peak ankle dorsiflexion moment at push-off was associated with the energy cost of walking. Therefore, modifying sagittal plane hip ROM and peak ankle dorsiflexion moment could be a possible rehabilitation strategy to improve gait efficiency in women with hip OA.

中文翻译：

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矢状面踝关节动力学与髋骨关节炎女性的动态髋关节运动范围和步态效率相关

矢状面髋关节运动范围 (ROM) 丧失是髋骨关节炎 (OA) 患者常见的步行步态障碍。本研究的目的是评估矢状面髋关节 ROM 减少以及步态期间由此产生的矢状面踝关节动力学改变是否影响髋关节 OA 患者行走的能量消耗。我们评估了 24 名患有单侧髋骨关节炎的女性（60 ± 9.1 岁；29.4 ± 6.1 kg/m ²). 通过仪器化步态分析评估矢状面髋关节 ROM 和峰值踝关节背屈力矩。我们还使用便携式代谢系统来测量步行的能量消耗。进行皮尔逊相关和回归分析以检验我们的假设。我们发现受累的肢体矢状面髋关节 ROM 与步态推离时较大的踝关节峰值背屈力矩相关（R  = 0.50，p  = 0.01）。下推时较大的受累肢体峰值踝背屈力矩与较低的步态耗氧量相关（R  = -0.51，p  = 0.01）。下推时受累肢体峰值踝关节背屈力矩预测 O _{2方差的 26%}成本。临床意义声明：矢状面髋关节 ROM 与髋关节 OA 女性步态推离时的峰值踝关节背屈力矩相关。此外，蹬离时的峰值踝背屈力矩与步行的能量消耗有关。因此，改变矢状面髋关节 ROM 和峰值踝关节背屈力矩可能是改善髋关节 OA 女性步态效率的一种可能的康复策略。