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Challenging the Long-Held Belief: More Sleep Isn’t Always Better
For years, health experts and popular advice columns have urged people to prioritize longer, uninterrupted sleep for good health. However, a recent study led by researchers at the University of Oklahoma turns this guidance on its head, suggesting that sleeping for more than nine hours regularly could be more detrimental than previously thought.
Key Findings: The Surprising Dangers of Excessive Sleep
The study, which analyzed data from 79 previous studies spanning at least a year each, has found a deeper link between prolonged sleep and higher mortality rates:
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People sleeping less than seven hours a night: 14% higher risk of dying during the study period compared to those with 7–8 hours of sleep.
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People sleeping more than nine hours a night: 34% higher risk of early death than those who logged the recommended 7–8 hours nightly.
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Increasing risk by the hour: Each hour of sleep above the nine-hour mark further escalated risk, with ten-hour sleepers facing a 30% increase in mortality.
While the dangers of insufficient sleep have long been recognized—leading to headaches, reduced concentration, cardiovascular disease, metabolic disorders, and even increased cancer risk—this new research underscores that sleeping too much may signal underlying health issues.
Ongoing Risks: Beyond Just Sleep Duration
The research is supported by earlier studies, including a major 2018 analysis that also linked oversleeping with elevated cardiovascular risk. Dr. Chun Shing Kwok, the lead author, said that “excessive sleep is a marker of elevated cardiovascular risk” and emphasized that poor-quality sleep was linked to a 44% higher risk of developing heart diseases.
Importantly, the study does not claim that sleeping longer hours directly causes these health problems. Instead, excessive sleep might serve as an indicator or symptom of deeper issues—such as depression, chronic pain, obesity, or metabolic trouble—rather than being the direct culprit behind them.
What Is the Ideal Amount of Sleep?
The ideal sleep duration varies among individuals and across age groups:
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Teenagers: 8–10 hours
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Most adults: 7–9 hours
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Seniors: 7–9 hours (though they may nap or rest more frequently)
Apart from duration, both the quality and consistency of sleep are crucial for well-being. Researchers stress that those who sleep more than nine hours and still feel fatigued should consult a healthcare provider, as persistent oversleeping may point to an underlying health concern.
Disclaimer
The findings in this article are based on statistical associations and do not prove that sleeping more than nine hours directly causes health issues or early death. Oversleeping could be a symptom of other health problems. Everyone’s sleep needs are different; if you are concerned about your sleep duration or quality, consult a medical professional for personalized advice.
