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Daily physical activity is associated with reduced risk for Alzheimer disease (AD) among elders, a new study shows. Roughly 700 adults (average age, 82) free of dementia wore actigraphs on their wrists 24 hours a day for up to 10 days to measure their daily physical activity. During a mean 3.5-year follow-up, 10% were diagnosed with AD. Participants in the lowest decile of physical activity had more than twice the AD as those in the highest decile. The results remained significant after adjustment for self-reported physical, social, and cognitive activities and for performance on motor function tests. More physical activity on actigraphy was also associated with less cognitive decline.
Editorialists conclude, “In a world that is becoming pro…