"Feeling younger, walking faster": subjective age and walking speed in older adults
"Feeling younger, walking faster": subjective age and walking speed in older adults
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DOI：
10.1007/s11357-015-9830-9
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发表时间：
2015-10-01
期刊：
影响因子：
--
通讯作者：
Terracciano, Antonio
中科院分区：
文献类型：
--
作者：
Stephan, Yannick;Sutin, Angelina R.;Terracciano, Antonio
步行速度是老年人的一个关键生命体征。考虑到步态速度减慢的影响，一部大型文献已经确定了与健康有关的、行为、认知和生物因素，这些因素缓解了与年龄相关的活动能力下降。这项研究旨在通过检验主观年龄，即年长或年轻的人相对于他们的实际年龄，是否对步行速度有贡献，从而为现有的知识做出贡献。参与者来自2008年和2012年的健康与退休研究(HRS，N=2970)以及2011年和2013年的国家健康与老龄化趋势研究(NHATS，N=5423)。在HRS和NHATS中，线性回归分析显示，在控制了年龄、性别、教育程度和种族的情况下，较年轻的主观年龄与基线时较快的步行速度和较少的随时间下降有关。这些关联的部分原因是抑郁症状、疾病负担、体力活动、认知、体重指数和吸烟。进一步的分析表明，感觉自己比自己的年龄小--在HRS的随访中，步行速度低于与虚弱相关的门槛0.6米/S的风险降低。本研究通过两项大型前瞻性研究为老年人的年龄主观体验和步行速度之间的关联提供了新的和一致的证据。主观年龄可能有助于确定老年人行动能力受限的风险，并可能成为旨在缓解功能衰退的干预措施的目标。
Walking speed is a key vital sign in older people. Given the implications of slower gait speed, a large literature has identified health-related, behavioral, cognitive, and biological factors that moderate age-related decline in mobility. The present study aims to contribute to existing knowledge by examining whether subjective age, how old or young individuals experience themselves to be relative to their chronological age, contributes to walking speed. Participants were drawn from the 2008 and 2012 waves of the Health and Retirement Study (HRS, N = 2970) and the 2011 and 2013 waves of the National Health and Aging Trends Study (NHATS, N = 5423). In both the HRS and the NHATS, linear regression analysis revealed that a younger subjective age was associated with faster walking speed at baseline and with less decline over time, controlling for age, sex, education, and race. These associations were partly accounted for by depressive symptoms, disease burden, physical activity, cognition, body mass index, and smoking. Additional analysis revealed that feeling younger than one's age was associated-with a reduced risk of walking slower than the frailty-related threshold of 0.6 m/s at follow-up in the HRS. The present study provides novel and consistent evidence across two large prospective studies for an association between the subjective experience of age and walking speed of older adults. Subjective age may help identify individuals at risk for mobility limitations in old age and may be a target for interventions designed to mitigate functional decline.