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Cortisol Awakening Response and Walking Speed in Older People. | LitMetric

Cortisol Awakening Response and Walking Speed in Older People.

PLoS One

Laboratory of Social Cognitive Neuroscience, Department of Psychobiology and IDOCAL, Universitat de València, Valencia, Spain.

Published: April 2017

AI Article Synopsis

Article Abstract

In older people, less diurnal variability in cortisol levels has been consistently related to worse physical performance, especially to slower walking speed (WS). The cortisol awakening response (CAR) is a discrete component of the hypothalamic-pituitary-adrenal axis that has been related to several health problems, such as cardiovascular disease and/or worse performance on executive function and memory. The relationship between the CAR and physical performance in older people is poorly understood. In this study, in 86 older people (mean age = 64.42, SD = 3.93), we investigated the relationship between the CAR and WS, a commonly used measure of physical performance in the older population that has also been related to health problems, such as cardiovascular disease and executive function performance in older people. Additionally, we studied whether the relationship between the CAR and WS was independent from cortisol levels on awakening and several possible confounders. Results showed that a CAR of reduced magnitude (measured with 3 samples each day, for two consecutive days, and calculated as the area under the curve with respect to the increase), but not cortisol levels on awakening, was related to slower WS. In addition, this relationship was independent from cortisol levels on awakening. It is possible that a CAR of reduced magnitude would contribute to less diurnal cortisol variability, affecting physical performance. Additionally, it is possible that a CAR of reduced magnitude affects WS through a possible negative effect on executive function, or that the association between the CAR and WS is due to the fact that both are related to similar health problems and to changes in cognitive performance in older people.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4871454PMC
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0152071PLOS

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