A recent study reported in Neuroscience News shows that being socially active and exercising are both protective of brain health. Participants in a longitudinal study who reported being more socially active or exercising more on a regular basis showed less decline in various measures of brain health over 12 years, including thinning of a part of the brain associated with memory, and decline in cognitive performance.
Original source: https://bionicoldguy.home.blog/2023/12/19/study-shows-exercise-and-social-life-protect-brain-health/