Study: Active elderly less likely to develop dementia

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New research offers more evidence that exercise helps the elderly stay young in mind and body.

Elderly people who exercise regularly are less likely to develop dementia than their sedentary peers, according to new research reported in the Annals of Internal Medicine.

The study, which involved nearly 2,000 people who were 65 or older at the start, suggests that walking just three times a week for 15 minutes each time will cut the risk of dementia by nearly 38%.