A self-reported study with adults over 65 years old suggests an association between exercise and brain volume, possibly “prevent(ing) or delay(ing) age-related decline in memory and thinking skills”
, the medical journal of the American Academy of Neurology, looks at the mechanisms involved in this relationship. The authors posit that exercise helps maintain insulin and body mass index levels, and help protect brain volume and thus may forestall dementia.
The researchers enlisted 134 people, average age 69, who did not have any memory problems. The participants filled out surveys about their physical activity over the past year. Then the researchers scanned the brains of the participants, measuring volume and glucose metabolism. They also measured BMI, insulin levels, cholesterol, blood pressure and other data.
The participants with the most physical activity also had a higher average glucose metabolism rate in the brain than participants with the least amount of activity.
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