02/11/2026
Just 20 Minutes of Exercise Twice a Week May Prevent Dementia.
Using data from the Health and Retirement Study, researchers found that older adults with mild-cognitive impairment were less likely to progress to dementia over an eight-year time period if they exercised at moderate-intensity—like brisk walking, for example—for at least 20 minutes twice a week. The findings demonstrate the ability of regular physical activity to delay or possibly prevent dementia.
Journal of Physical Activity and Health, March 2026