The effect of midlife physical activity on cognitive function among older adults: AGES--Reykjavik Study
Department of Medicine, Division of Geriatric Medicine; Department of Quantitative Health Sciences; Meyers Primary Care Institute
Medical Subject Headings
Adult; Aging; Alleles; Apolipoproteins E; Cognition; Cohort Studies; Dementia; Executive Function; Female; Genetic Predisposition to Disease; *Heterozygote; Humans; Longitudinal Studies; Male; Memory; Mental Processes; Middle Aged; Motor Activity; Neuropsychological Tests; Risk Reduction Behavior; Time Factors
Biostatistics | Epidemiology | Geriatrics | Health Services Research
BACKGROUND: There are few studies on the long-term associations of physical activity (PA) to cognition. Here, we examine the association of midlife PA to late-life cognitive function and dementia.
METHODS: The sample consisted of a population-based cohort of men and women (born in 1907-1935) participating in the Age Gene/Environment Susceptibility-Reykjavik Study. The interval between the midlife ascertainment of PA and late-life cognitive function was 26 years. Composite scores of speed of processing, memory, and executive function were assessed with a battery of neuropsychological tests, and dementia was diagnosed according to international guidelines. There were 4,761 nondemented participants and 184 (3.7%) with a diagnosis of dementia, with complete data for the analysis.
RESULTS: Among the participants, no midlife PA was reported by 68.8%, 5 hours PA by 4.5%. Excluding participants with dementia compared with the no PA group, both PA groups had significantly faster speed of processing (5 hours, beta = .32, p trend < .0001), better memory (5 hours, beta = .18, p trend < .0001), and executive function (5 hours, beta = .18, p trend< .0001), after controlling for demographic and cardiovascular factors. The
CONCLUSION: Midlife PA may contribute to maintenance of cognitive function and may reduce or delay the risk of late-life dementia.
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Citation: J Gerontol A Biol Sci Med Sci. 2010 Dec;65(12):1369-74. Epub 2010 Aug 30. Link to article on publisher's site