Age-related mechanical work expenditure during normal walking: The Baltimore Longitudinal Study of Aging
Age-related mechanical work expenditure during normal walking: The Baltimore Longitudinal Study of Aging
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DOI：
10.1016/j.jbiomech.2009.05.037
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发表时间：
2009-08-25
影响因子：
2.4
通讯作者：
Ferrucci, Luigi
中科院分区：
文献类型：
--
作者：
Ko, Seung Uk;Ling, Shari M.;Ferrucci, Luigi
这项横断面研究的目的是描绘与年龄相关的运动学和动力学步态模式的正常行走，并测试的假设，老年人表现出步态模式，减少产生的机械功支出（MWE）。我们研究了52名成年巴尔的摩老龄化纵向研究参与者（平均年龄72 +/- 9，从60岁到92岁），他们可以独立行走4米。三维运动学和动力学参数的旋转定义的步态期间进行了评估，以估计MWE的旋转下肢的内侧（ML）和前后（AP）轴的近端关节，这代表MWE在AP和ML侧，分别。步态参数和年龄之间的关系进行了检查，采用回归分析与步行速度，性别，身高和体重的调整。年龄越大，自主选择的步行速度越慢（p < 0.001），步幅越短（p < 0.001），平足着地的倾向越大（p = 0.003）。随着年龄的增长，站立时大腿旋转的髋关节生成MWE在AP轴（髋关节外展和内收）上较低（p = 0.010），而在站立后期ML轴（髋关节伸展和屈曲）上较高（p
The aim of this cross-sectional study was to delineate age-associated kinematic and kinetic gait patterns of normal walking, and to test the hypothesis that older adults exhibit gait patterns that reduce generative mechanical work expenditures (MWEs). We studied 52 adult Baltimore Longitudinal Study of Aging participants (means age 72 +/- 9, from 60 to 92 years) who could walk 4m unaided. Three-dimensional kinematic and kinetic parameters assessed during rotation-defined gait periods were used to estimate MWEs for the rotation of lower extremities about the medial-lateral (ML) and anterior-posterior (AP) axes of proximal joints, which represent MWEs in the AP and ML sides, respectively. Relationships between gait parameters and age were examined using regression analysis with adjustments for walking speed, sex, height, and weight. Older age was associated with slower self-selected walking speed (p < 0.001), shorter stride length (p < 0.001), and greater propensity of landing flat-footed (p = 0.003). With older age, hip generative MWE for thigh rotation was lower about the AP axis (hip abduction and adduction) during stance (p = 0.010) and higher about the ML axis (hip extension and flexion) during late stance (p