Sleep
Sleeping 6.4–7.8 Hours a Night Is Linked to the Lowest Biological Aging Across 23 Clocks
A 500,000-person UK Biobank analysis found a U-shaped relationship between nightly sleep duration and biological age across the brain, heart, lungs and metabolic system.
Singularity Wellness Editorial · 2026-08-24 · 1 min read
Sleeping 6.4–7.8 Hours a Night Is Linked to the Lowest Biological Aging Across 23 Clocks
Columbia University researchers analyzed sleep-duration data from roughly 500,000 UK Biobank participants against 23 biological ‘aging clocks’ covering 17 organ systems, finding the lowest aging levels among people sleeping 6.4 to 7.8 hours nightly. We cover this study in full below, including the researchers’ own caution that it shows association, not causation.