How sleep duration secretly controls how fast you age
A new study has uncovered how sleep duration affects the speed at which people age. Researchers using data from the UK Biobank found that both too little and too much sleep can make the body grow older faster. The findings, published in the journal Nature, suggest a clear link between rest and biological age.
The study analysed sleep patterns and their impact on aging in men and women. For women, the ideal sleep range to slow biological aging was 6.5 to 7.8 hours per night. Men benefited most from 6.4 to 7.7 hours of sleep.
The research revealed a U-shaped relationship between sleep and aging. Those who slept too little or too much showed faster wear and tear on key organs, including the immune system, skin, lungs, and liver. Chronic sleep deprivation, in particular, appeared to speed up the body’s decline. Oversleeping also raised concerns. People who consistently needed nine or more hours to feel rested might have underlying health problems. The study highlighted that extreme sleep durations—whether too short or too long—could push biological age forward.
The results point to a specific sleep range that helps slow aging in both men and women. Sticking to 6.4–7.8 hours per night may reduce strain on vital organs and support long-term health. The study reinforces the importance of balanced sleep for maintaining a younger biological age.
