A new large-scale study suggests that there may be an optimal range of nightly sleep linked to healthier aging outcomes.Researchers found that sleeping approximately between 6.4 and 7.8 hours per night is associated with more favorable long-term health indicators compared with sleeping significantly less or more than this range.

According to the findings, insufficient sleep over time is well known to contribute to a variety of health risks, including metabolic issues, cognitive decline, and increased stress on multiple bodily systems.However, the study also highlights that excessive sleep may not be harmless either.Long sleep duration was associated with signs of accelerated aging across nearly every major organ system examined.The results suggest that both extremes of sleep duration could be markers or contributors to underlying physiological stress or health conditions.The researchers emphasize that sleep quality and consistency likely play an important role alongside duration.People who regularly fall within the identified “sweet spot” range tended to show more stable health markers over time.

While the study does not claim that adjusting sleep alone can guarantee healthier aging, it reinforces the idea that balanced sleep habits are an important component of overall wellness.

Experts often recommend maintaining a consistent sleep schedule, limiting disruptions such as late-night screen exposure, and creating a sleep-conducive environment.

The findings contribute to a growing body of evidence that both too little and too much sleep may be associated with negative health outcomes, and that moderation in sleep duration could support healthier aging trajectories.