Exercise appears to benefit the brains of humans as well, another study has shown. It was conducted on cognitively normal subjects aged 45 to 88. In that study, individuals who exercised at or above levels recommended by the American Heart Association had lower levels of amyloid plaques—the hallmark of Alzheimer's disease—in their brains than did individuals who exercised less. The exercise benefit also extended to individuals who carried the APOE-e4 variant, which is a well-documented risk factor for Alzheimer's.
To learn more about the relationship between exercise and Alzheimer's plaques, see Psychiatric News.
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