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Walking May Cut Alzheimer's Risk

Walking 6 Miles a Week May Protect Against Dementia, Researchers Say

By Charlene Laino
WebMD Health News
Reviewed by Laura J. Martin, MD

Nov. 29, 2010 (Chicago) -- Walking a little over three-fourths of a mile a day may reduce the risk of Alzheimer's disease, researchers report.

Among people who already have mild cognitive impairment (MCI), walking a similar amount may slow the brain degeneration and memory loss associated with the condition, says Cyrus Raji, PhD, a radiologist at the University of Pittsburgh.

"In cognitively normal adults, walking 6 miles a week instead of being sedentary was associated with a 50% reduction in Alzheimer's risk over 13 years," he tells WebMD.

"In people with MCI, walking just 5 miles a week reduced brain atrophy and cognitive decline -- by more than 50%," Raji says.

Any type of exercise that's equivalent to walking 5 or 6 miles a week will probably offer the same brain protection, says Robert Zimmerman, MD, a neuroradiologist at New York-Presbyterian Hospital in New York City.

Zimmerman moderated a news briefing to discuss the findings at the annual meeting of the Radiological Society of North America.

Sourse : WebMD
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