TIME (6/26, MacMillan) reports a study published in the Journal of Alzheimer’s Disease found “people who did more moderate-intensity physical activity were more likely to have healthy patterns of glucose metabolism in their brains—a sign of healthy brain activity—than those who did less.” The authors found large doses of high-intensity exercise may be needed to offer the benefits of “a modest increase” in moderate activity, “suggesting that you don’t have to exercise to the extreme to get brain benefits.” Lead author Ozioma Okonkwo, assistant professor of medicine at the University of Washington School of Medicine and Public, says, in general, the evidence suggests that “light activity is insufficient, and vigorous activity might be unnecessary.”
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— “How Exercise May Protect the Brain From Alzheimer’s Disease,” Amanda MacMillan, Time, June ,26 2017.