Sleeping in on your days off may extend your life, according to a study.
Researchers found people who got less sleep during the week, but slept in on weekends had the same mortality rate as people who got seven hours of sleep each night.
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Over a decade was spent following nearly 44,000 people in Sweden to come up with the findings.
There's no obvious answer on why this makes a difference. One professor from the Stress Research Institute at Stockholm University thinks people are possibly catching up on lost sleep.
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The study was published in the Journal of Sleep Research.