Frequent exercise isn’t just important as a way of keeping aging bodies healthy. It can also keep the brain sharp, according to a new study. Researchers from the University of Georgia tracked the physical activity of 51 older adults. They assessed the group’s fitness with a walking test. Participants were asked to walk as quickly as they could to cover the maximum distance in six minutes. They also performed tests to measure cognitive functioning and underwent MRIs to assess brain function.

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