Does exercise really help your brain? Jury still out NatureHumBehav
But a combined review of 109 trials involving more than 11,000 healthy folks found evidence for that notion is weak overall, according to findings published March 27 in"There is little evidence for a positive relationship between regular physical exercise and improved cognition in healthy people," said lead researcher
During the last 50 years, there has been a steady flow of clinical trials reporting brain benefits of regular physical exercise in healthy individuals across the human life span, Ciria said. The researchers found that small but statistically significant positive effects of exercise on brain function disappeared after accounting for factors related to how the studies were conducted.
Ciria said researchers hope that their findings will serve as a call for rethinking public health policies that encourage exercise adherence based on its reputed cognitive benefits. But by focusing solely on clinical trials, this new review overlooks important scientific evidence gathered from other types of studies, Rao said.
"What you find is that the people who are genetically at risk for Alzheimer's, those people who didn't exercise showed a deterioration in cognition and increased atrophy of their brain," Rao said of his study, published in."So it may be that exercise may not make you smarter, but it can hold off disease in people who are vulnerable."
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