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Exercise Might Slow Brain Shrinkage in Alzheimer's Patients
Date:7/14/2008

Study found those who were more fit had larger brains

MONDAY, July 14 (HealthDay News) -- Men and women with early-stage Alzheimer's disease who were more physically fit also had larger brains compared to their counterparts in less stellar shape.

The findings, though preliminary, may indicate that staying physically fit could slow the brain atrophy (shrinkage) associated with Alzheimer's disease. Or they may indicate that some common underlying process affects both brain atrophy and cardiorespiratory fitness.

"This is a valid, reliable comparison, [but] it's cross-sectional, it provides only a snapshot of fitness as it relates to brain volume," said Dr. Gary Kennedy, director of geriatric psychiatry at Montefiore Medical Center in New York City. "We can't say if increased fitness increases brain volume. Animal models show this is possible. This sets the stage for an interventional study."

The findings are published in the July 15 issue of Neurology.

In older adults without dementia, staying in good physical shape may help offset the changes in the brain, such as cognitive decline, associated with normal aging.

But experts have not yet clearly defined whether or not physical activity has an effect on those with Alzheimer's.

"We're interested in how exercise impacts the Alzheimer's disease process. There's a lot of data in normal older adults that exercising and fitness may have a beneficial effect on brain health, but there's not a lot on Alzheimer's in terms of studies to draw on to inform our recommendations for exercise and fitness," said study author Dr. Jeffrey Burns, director of the Alzheimer's and Memory Program at the University of Kansas School of Medicine in Kansas City. "We're interested in better defining that relationship."

For this study, 57 people with early-stage Alzheimer's and 64 people without dementia, all aged 60 and over, underwent standard fitn
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