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Physical activity keeps hippocampus healthy in people at risk for Alzheimer's disease

Moderate physical activity may preserve the hippocampus -- the brain region responsible for memory and spatial orientation that is attacked first in Alzheimer's disease, a study of older adults at increased risk for Alzheimer's disease shows. It is the first evidence that physical activity may protect against cognitive decline and the onset of dementia symptoms in those who carry the genetic marker for Alzheimer's.
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