Department of Kinesiology & Applied Physiology, University of Delaware, United States.
Department of Chemical and Biomedical Engineering, West Virginia University, United States.
Gait Posture. 2024 Sep;113:232-237. doi: 10.1016/j.gaitpost.2024.06.011. Epub 2024 Jun 19.
Gait kinematics differ between settings and among young and older adults with and without knee osteoarthritis. Out-of-lab data has a variety of walking bout characteristics compared to controlled in-lab settings. The effect of walking bout duration on gait analysis results is unclear, and there is no standardized procedure for segmenting or selecting out-of-lab data for analysis.
Do gait kinematics differ by bout duration or setting in young and older adults with and without knee osteoarthritis?
Ten young (28.1±3.5 yrs), ten older adults (60.8±3.3 yrs), and ten older adults with knee osteoarthritis (64.1±3.6 yrs) performed a standard in-lab gait analysis followed by a prescribed walking route outside the lab at a comfortable speed with four IMUs. Walking speed, stride length, and sagittal hip, knee, and ankle angular excursion (ROM) were calculated for each identified stride. Out-of-lab strides included straight-line, level walking divided into strides that occurred during long (>60 s) or short (≤60 s) bouts. Gait kinematics were compared between in-lab and both out-of-lab bout durations among groups.
Significant main effects of setting or duration were found for walking speed and stride length, but there were no significant differences in hip, knee, or ankle joint ROM. Walking speed and stride length were greater in-lab followed by long and short bout out-of-lab. No significant interaction was observed between group and setting or bout duration for any spatiotemporal variables or joint ROMs.
Out-of-lab gait data can be beneficial in identifying gait characteristics that individuals may not encounter in the traditional lab setting. Setting has an impact on walking kinematics, so comparisons of in-lab and free-living gait may be impacted by the duration of walking bouts. A standardized approach for to analyzing out-of-lab gait data is important for comparing studies and populations.
在有和没有膝骨关节炎的年轻人和老年人中，步态运动学在不同环境和人群之间存在差异。与受控的实验室环境相比，实验室外数据具有各种步行回合特征。步行回合持续时间对步态分析结果的影响尚不清楚，并且没有用于分析的实验室外数据分段或选择的标准化程序。
在有和没有膝骨关节炎的年轻人和老年人中，步态运动学是否因回合持续时间或环境而异？
十名年轻人（28.1±3.5 岁）、十名老年人（60.8±3.3 岁）和十名患有膝骨关节炎的老年人（64.1±3.6 岁）在实验室进行了标准步态分析，然后在舒适速度下按照规定的路线在实验室外行走，共使用四个惯性测量单元。为每个确定的步幅计算行走速度、步幅长度以及矢状面髋、膝和踝关节角度（ROM）。实验室外的步幅包括直线路径，水平行走，分为在长（>60 秒）或短（≤60 秒）回合中发生的步幅。在组间比较实验室内和两种实验室外回合持续时间的步态运动学。
在行走速度和步幅长度方面发现环境或回合持续时间的主要影响显著，但髋、膝或踝关节 ROM 没有显著差异。实验室内的行走速度和步幅长度最大，然后是长回合和短回合的实验室外行走。在任何时空变量或关节 ROM 方面，组与环境或回合持续时间之间均未观察到显著的交互作用。
实验室外的步态数据有助于识别个体在传统实验室环境中可能不会遇到的步态特征。环境对行走运动学有影响，因此实验室内和自由行走步态的比较可能受到行走回合持续时间的影响。用于分析实验室外步态数据的标准化方法对于比较研究和人群很重要。
