Sleeping with lights on can cause weight gain, new study bares

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Have you been sleeping with the lights on?

Whatever your sleeping habit is, you might want to check this out.

A recent study showed that a lot of light that’s turned on while you are sleeping — whether it’s the light from a television or a bright nightlight — has been linked to possible weight gain and obesity.

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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,” a report said.

According to Dale Sandler, a senior author of the study, there was 17 percent chance of gaining the five kilograms while a 22-percent chance of becoming overweight and a 33-percent chance of becoming obese.

Between 2003 and 2009, Sandler and her team analyzed data on 43,722 women, aged 35 to 74, in the United States.

Each woman’s exposure to light during sleep, such as if she slept with a small nightlight or a television on, and her body mass index — were probed for over five years.

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It was then revealed that “sleeping with a television or light on in the room was associated with gaining five kilograms or more with a BMI increase of at least 10%, and a higher risk of being overweight or obese, compared with being exposed to no artificial light during sleep.”

The study also backed previous research that linked light exposure at night with 10 percent increase in body mass index over a 10-year period in older adults.

However, Sandler said more research is needed to determine whether sleeping with lights on actually could cause weight gain as their analysis was only based on self-reports made by the participants.