Sleep Regularity Tracks Cognition

TokyoResearchers tracked 120 elders across 46,720 sleep-nights.

Each 1-point regularity gain meant up to 70% higher odds of sharper cognition.

The metric measures the minimum work to reshape one day’s activity pattern into another, not just total hours.

The finding comes from one cohort in Japan, and whether it generalizes elsewhere is untested.

Sources: Nature