Just 6 months of moderate exercise -- walking or pedaling a stationary bike -- was equivalent to shaving 9 years from older adults' brain age, a recent study found.
The effect was equivalent to shaving about nine years from their brain age, said lead researcher James Blumenthal, a professor at Duke University School of Medicine, in Durham, N.C.
"And it's never too late to start," said Keith Fargo, director of scientific programs and outreach for the Alzheimer's Association."The people in this study were older, already had cognitive [mental] impairments and cardiovascular risk factors, and they were sedentary."He said that's in large part because this was athat actually put exercise to the test. Many past studies have found that physically active people tend to be in better mental shape as they age.
None had full-blown dementia, such as Alzheimer's disease. But at the outset, the group's performance on tests of executive function was similar to that of people in their early 90s -- even though their real average age was about 65. Blumenthal stressed that the study group was small, which makes it more difficult to tease out the effects of each intervention. He said larger studies are still needed.
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