Sleeping 6.4 to 7.8 Hours a Night May Slow Biological Aging, Study Finds
A new study published in May 2026 found that sleeping between 6.4 and 7.8 hours per night is linked to slower biological aging of the brain and other organs. Researchers at Columbia University analyzed data from thousands of adults and found that both too little and too much sleep were associated with faster aging. The findings add to growing evidence that sleep quality is a key factor in long-term health.
A new study published in May 2026 found that sleeping between 6.4 and 7.8 hours per night is linked to slower biological aging of the brain and other organs.
Researchers at Columbia University Irving Medical Center analyzed data from thousands of adults and found that both too little and too much sleep were associated with faster biological aging. The sweet spot, according to the data, falls between 6.4 and 7.8 hours.
The study measured biological age using markers that reflect the actual condition of organs and tissues, rather than chronological age. People who slept outside the optimal range showed signs of accelerated aging in the brain, heart, lungs, and other systems.
Healthline reported the findings as part of its May 2026 health news coverage. The research adds to a growing body of evidence that sleep is one of the most important factors in long-term health and longevity.
Sleep health has become a major focus in wellness circles in 2026. Tools like portable EEG headbands, advanced sleep sensors, and AI-driven tracking apps are now widely used to monitor sleep patterns.
Researchers recommend maintaining a consistent sleep schedule, keeping the bedroom cool and dark, and avoiding screens for at least an hour before bed. They also suggest limiting caffeine and alcohol in the hours before sleep.
The study's authors said more research is needed to understand the exact mechanisms linking sleep duration to biological aging.
