Tag

Dementia

An older woman in athletic wear walks a park path with Nordic walking poles at dusk

In older adults, exercising more than twice a week tracked with lower dementia risk

A study of 9,714 older Americans found that people who kept up at least moderate activity - roughly 20 minutes, twice a week or more - were less likely to develop Alzheimer's or another dementia. Less frequent activity showed no clear benefit. Because it followed people rather than assigning exercise, it points to a link, not proof.

Jul 21, 2026

A man lying on his back in bed in a dark room at night

Explainer

A regular sleep schedule tracked with lower dementia risk, even for people who slept too little

Researchers measured a week of wrist-monitor sleep in 82,391 UK adults and followed them for years. Those with the most regular schedules were less likely to develop dementia, and a steady rhythm seemed to offset the risk that came with sleeping too little. Because it followed people rather than assigning sleep habits, it shows a link, not proof.

Jul 21, 2026