Interesting. Tiny sample size, but if substantiated, it might be another of the many reasons shift work had an adverse effect on health.
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New research suggests that one night of sleep with just a moderate amount of light may have adverse effects on cardiovascular and metabolic health.
"I was surprised that even this fairly, I would say, small amount of light just getting through the eyes to the brain still had such notable effect," says Dr. Phyllis Zee, senior author of the new study and director of the Center for Circadian and Sleep Medicine at Northwestern University.
The findings tie into a broader body of evidence that indicates being exposed to light at night may be harmful in a variety of ways and could predispose people to chronic diseases.
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The results, published in the Proceedings of the National Academy of Sciences this month, show several clear differences between the two groups.
Unlike those who spent both nights in the dark, the group exposed to the light had elevated heart rates throughout the night. They also had increased insulin resistance in the morning, meaning they had more trouble getting their blood sugar into a normal range.
https://www.npr.org/sections/health-...disrupts-sleep