News for Healthier Living

In Older Adults, Fragmented Circadian Rest-Activity Rhythms Linked to Faster Brain Shrinkage Over Time

A study measuring daily rest-activity rhythms in older adults with no cognitive impairment found that weaker, more fragmented daily rhythms were associated with smaller memory-related brain regions and, in subsequent follow-ups, faster brain atrophy.

April 14, 2026


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