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Physical activity and incident cognitive impairment in elderly persons: the INVADE study
Thorleif Etgen1, Dirk Sander, Ulrich Huntgeburth
1Department of Psychiatry and Psychotherapy, Technische Universität München, Munich, Germany. thorleif.etgen@klinikum-traunstein.de
Archives of Internal Medicine
|January 27, 2010
Summary
Regular physical activity, including moderate or high levels, significantly lowers the risk of developing cognitive impairment in older adults. This 2-year study highlights the protective effects of exercise on brain health in the elderly population.
Area of Science:
- Gerontology
- Neuroscience
- Public Health
Background:
- Limited and conflicting data exist on the link between physical activity and cognitive impairment.
- This study investigates the association between physical activity levels and the incidence of cognitive impairment in older adults.
Purpose of the Study:
- To determine if physical activity is associated with a reduced risk of developing cognitive impairment over a 2-year follow-up period.
- To analyze the impact of different physical activity levels on incident cognitive impairment in an elderly cohort.
Main Methods:
- A community-based prospective cohort study in southern Bavaria, Germany, enrolled 3903 participants aged over 55.
- Participants were followed for 2 years, with physical activity, cognitive function (6-Item Cognitive Impairment Test), and confounders assessed at baseline.
- Incident cognitive impairment after 2 years was the primary outcome measure.
Main Results:
- At baseline, 10.7% of participants had cognitive impairment. Over 2 years, 5.9% of initially unimpaired subjects developed cognitive impairment.
- Compared to no physical activity, moderate or high physical activity was associated with a significantly reduced risk of incident cognitive impairment (OR, 0.57-0.54).
- In a sub-analysis of participants without functional or prodromal dementia impairment, moderate or high physical activity showed an even greater risk reduction (OR, 0.44-0.46).
Conclusions:
- Moderate to high levels of physical activity are linked to a lower incidence of cognitive impairment in elderly individuals.
- The findings suggest physical activity is a protective factor against cognitive decline in older adults.
- This large population-based study provides strong evidence for the benefits of exercise for cognitive health in aging.
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