Low Deep Sleep on a Tracker
A low deep-sleep estimate may reflect device error or age-related change. Trackers misclassify stages, so symptoms and longer patterns matter more.
Read articleSubcategory
Deep & REM Sleep
REM Sleep and Aging
REM sleep tends to decline across adulthood. Lower REM is associated with mortality and dementia, while acting out dreams warrants medical evaluation.
Read article
Deep Sleep and Aging
Deep sleep generally declines across adulthood. Faster loss was linked to dementia in one cohort, but causation and ways to restore it remain uncertain.
Read article