Lights On During Sleep to increase risk of diabetes and heart disease - Video

CHICAGO - Sleeping with a light on can increase insulin resistance and consequently impair the response to glucose, reports a two-night sleep-lab study of 20 people conducted by new Northwestern Medicine. Exposure to even moderate ambient lighting during nighttime sleep, compared to sleeping in a dimly lit room, harms your cardiovascular function during sleep and increases your insulin resistance the following morning.

"The results from this study demonstrate that just a single night of exposure to moderate room lighting during sleep can impair glucose and cardiovascular regulation, which are risk factors for heart disease, diabetes and metabolic syndrome," said senior study author Dr. Phyllis Zee, chief of sleep medicine at Northwestern University Feinberg School of Medicine and a Northwestern Medicine physician. "It's important for people to avoid or minimize the amount of light exposure during sleep."

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Lights On During Sleep Can Increase Risk Of Diabetes And Heart Disease