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Physical activity and physical function in older adults: the 45 and up study
Lisa C Yorston1, Gregory S Kolt, Richard R Rosenkranz
1School of Science and Health, University of Western Sydney, Penrith, NSW, Australia.
Journal of the American Geriatrics Society
|April 11, 2012
Summary
Regular physical activity is strongly linked to better physical function in older adults. Engaging in more exercise significantly reduces the likelihood of experiencing functional limitations as people age.
Area of Science:
- Gerontology
- Public Health
- Exercise Science
Background:
- Physical function declines with age, impacting independence and quality of life in older adults.
- Understanding factors that preserve physical function is crucial for healthy aging interventions.
- Physical activity is a modifiable behavior with potential benefits for physical function.
Purpose of the Study:
- To quantify the association between physical activity levels and physical function in a large cohort of older adults.
- To investigate the predictive value of physical activity engagement on functional limitations in later life.
Main Methods:
- Cross-sectional study design utilizing baseline data from the 45 and Up Study in Australia.
- Inclusion of 91,375 Australian adults aged 65 and over.
- Assessment of physical activity, physical function, and covariates including psychological distress, BMI, and education.
Main Results:
- A significant positive correlation (r=0.166, P<.001) was observed between higher physical activity and better physical function.
- Increased physical activity was associated with progressively lower odds of functional limitation (highest tertile OR=0.28, AOR=0.36).
- The relationship remained significant after adjusting for multiple confounding factors.
Conclusions:
- Physical activity is a significant predictor of physical function in older adults.
- Higher engagement in physical activity is associated with a reduced likelihood of functional limitation.
- Promoting physical activity is a key strategy for maintaining physical function and independence in aging populations.
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