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首页> 外文期刊>Gait & posture >Alterations in gait speed and age do not fully explain the changes in gait mechanics associated with healthy older women
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Alterations in gait speed and age do not fully explain the changes in gait mechanics associated with healthy older women

机译：步态速度和年龄的变化不能完全解释与健康老年妇女相关的步态力学变化

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Older adults exhibit modified gait patterns compared to the young, adopting movement strategies in response to changes in musculoskeletal function. Investigating the functional mobility of older women is particularly important because of their increased life expectancy and greater falls risk compared to men. We explored the relationships between gait parameters and age in healthy older women whilst accounting for declining gait speeds. Kinematic and kinetic data were collected from thirty-nine women (60-83 years) whilst walking at a comfortable cadence. Regression analysis assessed the capacity of gait speed and age to explain the variance in gait associated with older age. Speed explained the majority of variance in many gait parameters. By including age in the regression, the total explained variance (R2) for foot clearance (70%), ankle plantarflexion angle (30%), peak ankle plantarflexor moment (58%), and hip power generation (56%) were significantly (p0.05) greater than for speed alone. Nonetheless, changes in speed and age did not fully explain the variance in gait mechanics associated with older age and other contributing factors must exist. Losses of 1.2%/year in gait speed were predicted by age, exceeding previous predictions of -0.7%/year. Furthermore, the accumulation of apparently small decreases of 0.2cm/year in peak foot-to-ground clearance has clinical implications and offers insight into the mechanisms by which gait becomes hazardous in older age.
机译：与年轻人相比，老年人表现出改良的步态模式，并根据肌肉骨骼功能的变化采取运动策略。调查老年妇女的功能活动尤为重要，因为与男性相比，老年妇女的预期寿命更长，跌倒风险更大。我们探讨了健康老年妇女的步态参数与年龄之间的关系，同时说明了步态速度下降。从三十九名妇女（60-83岁）中以舒适的节奏行走时收集了运动学和动力学数据。回归分析评估了步态速度和年龄的能力，以解释与年龄相关的步态差异。速度解释了许多步态参数的大部分变化。通过在回归中包括年龄，足部间隙（70％），踝an屈角度（30％），踝plant屈峰值（58％）和髋关节发电（56％）的总解释方差（R2）显着（ p <0.05）大于单独的速度。但是，速度和年龄的变化并不能完全解释与年龄有关的步态力学差异，并且必须存在其他影响因素。根据年龄预测，步态速度每年下降1.2％，超过先前预测的-0.7％/年。此外，脚部到地面的峰值清除率每年明显减少0.2cm的累积具有临床意义，并为步态在老年人中变得有害的机理提供了见识。

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