New studies suggest that exposure to ambient light while sleeping at night can increase heart rate and blood sugar levels the next day.
Senior Research Author Phyllis Zee, Dean of Sleep Medicine, Northwestern University School of Fineberg Medicine, Said in a news release The results of this study show that overnight exposure to moderate light during sleep can “impair glucose and cardiovascular regulation.”
the study, Published on PNAS on MondayWe tested the effect of sleeping in moderate light and sleeping in dim light all night long. Participants exposed to moderate light showed a higher level of arousal.
Researchers have noted similarities in the way the human nervous system responds to light, both during the day (when light raises awareness and raises heart rate) and during sleep.
“Even if you sleep, your autonomic nervous system is activated. That’s not good. Heart rate and other cardiovascular parameters are usually low at night and high during the day,” Northwestern said. Daniela Grimaldi, co-lead author of the university and assistant professor of neurology research, said.
Meanwhile, researchers have also found a link between sleep in bright rooms and diabetes and obesity. They pointed out that people exposed to light during sleep showed increased insulin resistance the next morning, which could lead to elevated blood sugar levels over time. According to Gee, this is an addition to the results of previous studies that healthy people exposed to light during sleep are overweight and obese.
“Now we’re showing the basic mechanism to explain why this happens,” Zee said. “It shows that it affects the ability to regulate glucose.”
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“In addition to sleep, nutrition and exercise, exposure to light during the day is an important factor for health, but moderate intensity light at night can impair heart and endocrine health measurements. “We do,” Zee added.
Zee then provided advice on how to mitigate the effects of nighttime light exposure. First, she said, turn off the lights. If this is not possible, avoid exposing it to the blue light of a screen and keep it away from sleeping people. If you need a light, choose a color that is less irritating. Finally, Zee recommends blackout curtains or eye covers.
According to Zee, there is one clear way to determine if your room is too bright.
“If you can see things really well, it’s probably too light,” Gee said.
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