Physical Activity and Physical Function in Older Adults: The 45 and Up Study
Version of Record online: 5 APR 2012
© 2012, Copyright the Authors Journal compilation © 2012, The American Geriatrics Society
Journal of the American Geriatrics Society
Volume 60, Issue 4, pages 719–725, April 2012
How to Cite
Yorston, L. C., Kolt, G. S. and Rosenkranz, R. R. (2012), Physical Activity and Physical Function in Older Adults: The 45 and Up Study. Journal of the American Geriatrics Society, 60: 719–725. doi: 10.1111/j.1532-5415.2012.03906.x
- Issue online: 11 APR 2012
- Version of Record online: 5 APR 2012
- older adults;
- psychological distress;
- sedentary lifestyle;
- activities of daily living;
To determine the strength of the relationship between physical activity and physical function in older adults.
The 45 and Up Study baseline questionnaire, New South Wales, Australia.
Ninety-one thousand three hundred seventy-five Australian men and women aged 65 and older from the 45 and Up Study.
Physical activity engagement (Active Australia Survey), physical function (Medical Outcomes Study Physical Functioning), psychological distress (Kessler-10), and self-reported age, smoking history, education, height, and weight were all measured.
Higher levels of physical activity were associated with better physical function in older adults (correlation coefficient = 0.166, P < .001). Participants engaging in higher levels of physical activity had progressively lower likelihoods of functional limitation (middle tertile: odds ratio (OR) = 0.39, 95% confidence interval (CI) = 0.38–0.41; highest tertile: OR = 0.28, 95% CI = 0.27–0.29). This relationship remained significant, but weakened slightly, when adjusted for age, sex, body mass index, smoking history, psychological distress, and educational attainment (middle tertile: adjusted OR (AOR) = 0.48, 95% CI = 0.46–0.50; highest tertile: AOR = 0.36, 95% CI = 0.34–0.37).
There is a significant, positive relationship between physical activity and physical function in older adults, with older adults who are more physically active being less likely to experience functional limitation than their more-sedentary counterparts. Level of engagement in physical activity is an important predictor of physical function in older adults.