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首页> 外文期刊>The journals of gerontology.Series A. Biological sciences and medical sciences >Age-associated effects of a concurrent cognitive task on gait speed and stability during narrow-base walking.
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Age-associated effects of a concurrent cognitive task on gait speed and stability during narrow-base walking.

机译：并发认知任务对窄基步行过程中步态速度和稳定性的与年龄相关的影响。

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BACKGROUND: In older adults, changes in speed and stability during walking are associated with impaired balance and increased fall risk. Narrow-base walking requires increased frontal plane stability and can be used to assess postural control while walking. Performance of a concurrent cognitive task (dual task) may further increase the complexity of walking, potentially allowing identification of individuals with instability that is not detected under single-task conditions. The purpose of this study was to examine age-associated effects of a cognitive task on speed and frontal plane stability during narrow-base walking. METHODS: Thirty-four healthy adults participated, categorized by age: <65, 65-74, and >/=75 years. Participants walked at a comfortable pace within a narrow path under both single- and dual-task conditions. We examined spatiotemporal variables and frontal plane center of mass (CoM) parameters using a 13-segment biomechanical model. RESULTS: Increasing age (p <.001) and the performance of a concurrent cognitive task (p <.001) were both associated with decreased speed, with no interaction between these factors. Frontal plane CoM displacement and velocity increased with increasing age (both p <.001), but dual-task performance had no effect on these variables (both p >.450). CONCLUSIONS: Age-associated changes in both speed and stability are observed during narrow-base walking. Among this sample of healthy older adults, the addition of a concurrent cognitive task resulted in reduced speed, with no effect on frontal plane stability. Further research is needed to determine if dual-task, narrow-base walking is a sensitive and specific approach to identifying older adults at risk for falls.
机译：背景：在老年人中，步行过程中速度和稳定性的变化与平衡能力受损和跌倒风险增加有关。狭窄的步行需要增加额平面的稳定性，并且可以用来评估步行时的姿势控制。并发认知任务（双重任务）的执行可能会进一步增加步行的复杂性，从而可能识别出在单任务条件下未检测到的不稳定个体。这项研究的目的是检查与认知有关的任务对窄步行走过程中速度和额叶面稳定性的影响。方法：34名健康成人参加，按年龄分类：<65岁，65-74岁和> / = 75岁。在单任务和双任务条件下，参与者都以舒适的步伐在狭窄的道路上行走。我们使用13段生物力学模型检查了时空变量和额面质心（CoM）参数。结果：年龄增长（p <.001）和同时执行认知任务（p <.001）均与速度下降相关，而这些因素之间没有相互作用。额叶CoM位移和速度随着年龄的增长而增加（均为p <.001），但是双重任务性能对这些变量没有影响（均为p> .450）。结论：在窄基步行中观察到了与年龄相关的速度和稳定性变化。在这个健康的老年人样本中，同时执行认知任务会导致速度降低，而不会影响额叶面的稳定性。需要做进一步的研究以确定双任务，窄基步行是否是识别有跌倒危险的老年人的灵敏且特定的方法。

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