Current and past leisure time physical activity in relation to risk of Alzheimer's disease in older adults
- PMID: 31587996
- PMCID: PMC6948182
- DOI: 10.1016/j.jalz.2019.07.013
Current and past leisure time physical activity in relation to risk of Alzheimer's disease in older adults
Abstract
Introduction: The associations between self-reported current and past leisure time physical activity (LTPA) and Alzheimer's disease (AD) incidence were determined using data from the multiethnic Washington/Hamilton Heights-Inwood Columbia Aging Project (WHICAP) study.
Methods: The metabolic equivalent of LTPA energy expenditure was calculated for self-reported current and past LTPA for 1345 older adults. A Cox proportional hazard model was conducted to estimate the association between LTPA (low, middle, and high) and incident AD risk.
Results: Comparing high to low level, current and past LTPA were both associated with reduced AD risk, with hazard ratio (95% confidence interval) = 0.39 (0.20-0.75) and 0.37 (0.18-0.75), respectively. Compared with "always low," "increased" and "always high" LTPA throughout life were associated with reduced AD risk, with hazard ratio (95% confidence interval) = 0.60 (0.36-0.99) and 0.28 (0.08-0.94), respectively. Light- and moderate-intensity LTPA were associated with lower AD risk.
Discussion: LTPA both throughout life and later in life are associated with lower risk of AD.
Keywords: Alzheimer's disease; Dementia; Epidemiology; Longitudinal study; Physical activity.
Copyright © 2019 the Alzheimer's Association. Published by Elsevier Inc. All rights reserved.
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