According to, Korean researchers found that people who stay up very late are at a higher risk of muscle deterioration, diabetes, and metabolic disease despite getting the same amount of sleep as those who wake up early.

Assistant Professor at Pennington Biomedical Research Center, Dr. Courtney Peterson, says she’s not surprised about these results.

“We’ve known for many years now that people who engage in shift work, at night, are at much greater risk of cardiovascular disease, diabetes, and a host of health problems.”

Peterson says quality sleep can help regulate several body functions.  The study followed sleep cycles of more than 1,600 people between the ages of 47 and 59.  They found that about 100 were night owls and 500 were early risers.  Peterson says one theory suggests that sleep during the day is not as good because of blue light interrupting your internal clock.

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