Brisk Walk Can Boost Blood Flow to the Brain:
TUESDAY, April 12 (HealthDay News) -- Moderate aerobic exercise
helps boost blood flow to the brain in older women, new research
The small study included 16 women aged 60 and older who walked
briskly for 30 to 50 minutes three or four times a week for three
months. By the end of that time, the amount of blood flow to the
brain had increased by as much as 15 percent.
The researchers also found that the women's VO2 max -- the
body's maximum capacity to transport and use oxygen during exercise
-- increased about 13 percent, their blood pressure fell an average
of 4 percent, and their heart rates decreased about 5 percent.
The findings offer insight into how vascular health affects
brain health, lead researcher Rong Zhang, of the Institute for
Exercise and Environmental Medicine at Texas Health Presbyterian
Hospital in Dallas, explained in a news release from the American
Zhang and the other researchers used Doppler ultrasonography to
chart blood flow in the women's carotid arteries, which are located
in the neck and supply the brain with crucial glucose and
oxygen-rich blood. The blood also gets rid of brain metabolic
wastes such as amyloid-beta protein (implicated in Alzheimer's
disease) that have been released into the brain's blood
The study is scheduled for presentation this week at the
Experimental Biology annual meeting, in Washington, D.C., as part
of the scientific program of the American Physiological
"There are many studies that suggest that exercise improves brain function in older adults, but we don't know exactly why the brain improves. Our study indicates it might be tied to an improvement in the supply of blood flow to the brain," Zhang said in the news release.
It's not known if increasing blood flow to the brain can help
prevent Alzheimer's disease and other types of dementia but "there
is strong evidence to suggest that cardiovascular risk is tied to
the risk for Alzheimer's disease," Zhang said.
Because this study was presented at a medical meeting, the
findings should be viewed as preliminary until they are published
in a peer-reviewed journal.
The Society for Neuroscience has more about
keeping your brain healthy as you age.
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