(CNN) Keeping a lot of light on while you snooze — such as from a television or bright nightlight — has been linked with an increased risk of weight gain and obesity.
Specifically, sleeping with a television or light on in the room was positively associated with gaining five kilograms, or 11 pounds, over a five-year period among women in a new study published in the medical journal JAMA Internal Medicine on Monday.
“There was a 17% chance of gaining the five kilograms — after we adjusted for confounding factors,” said Dale Sandler, a senior investigator at the National Institute of Environmental Health Sciences in North Carolina and senior author of the study.
In addition, there was a 22% chance of becoming overweight and a 33% chance of becoming obese, she added.
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