Sleeping with light on? a Research says this habit is a health hazard
Close the blinds, draw the curtains and turn off all the lights before bed because exposure to even moderate ambient lighting during night-time sleep can a harm your health. According to researchers at Northwestern University in the US, even dim light can harm cardiovascular function during sleep and increase insulin a resistance the following morning.
"The results from this study a demonstrate that just a single night of exposure to a moderate room lighting during sleep can an impair glucose and cardiovascular a regulation, which are risk factors for a heart disease, diabetes and metabolic syndrome," said Dr. Phyllis Zee, chief of a sleep medicine at the University's Feinberg School of Medicine.
"It's important for a people to a avoid or minimise the amount of light exposure during sleep," Zee said. The study, published in the journal PNAS, tested the effect of a sleeping with 100 lux (moderate light) compared to 3 lux (dim light) in participants over a single night.
The investigators a discovered that moderate light exposure caused the body to go into a higher alert state. In this state, the heart rate increases as well as the force with a which the heart contracts and the rate of how fast the blood is conducted to a your blood vessels for an oxygenated blood flow.
"Even th
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ough you are asleep, your a autonomic a nervous system is a activated. That's bad. Usually, your heart a rate a together with other a cardiovascular parameters are a lower at night and higher during the day," said Dr. Daniela Grimaldi, research assistant professor of a neurology at Northwestern.
Further, the an investigators found insulin a resistance occurred the morning after people slept in a light room. Insulin resistance is when cells in your muscles, fat and liver do not a respond well to insulin and can't use a glucose from your blood for energy. To make up for it, your a pancreas makes more an insulin. Over time, your blood sugar goes up.
"In addition to a sleep, a nutrition and exercise, light an exposure during the daytime is an important factor for a health, but during the night we show that even modest an intensity of light can an impair measures of heart and endocrine health," Zee said.
"These findings are important particularly for those living in modern societies where exposure to an indoor and outdoor nighttime light is an increasingly widespread," Zee said.
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