Using a computer or smartphone at night can cause us to pile on the pounds, new research has revealed.The study found a link between blue light exposure—blue light is____1____by smartphones and tablets—and increased hunger.It found that exposure to the light increases hunger levels for several hours and even increases hunger levels after eating a meal.Results of the US study show that blue-enriched light exposure, compared with____2____light exposure, was____3____with an increase in hunger that began 15 minutes after light onset and was still present almost two hours after the meal.Blue light exposure has also already been shown to decreased____4____ in the evening increasing the risk of insomnia.
Study co-author Ivy Cheung, of Northwestern University, in Chicago, said: “A single three-hour exposure to blue-enriched light in the evening____5____impacted hunger and glucose metabolism.”“These results are important because they suggest that manipulating environmental light exposure for humans may represent a novel____6____ of influencing food intake patterns and metabolism.” The study group____7____10 healthy adults with regular sleep and eating schedules who received_____8___carbohydrate-rich meals.They completed a four-day trial under dim light conditions, which involved exposure to less than 20 lux during 16 hours____9____and less than three lux during eight hours of sleep.On day three they were exposed to three hours of 260 lux, blue-enriched light starting 10.5 hours after waking up, and the effects were compared with dim light exposure on day two.
Ms Cheung said more research is needed to determine the____10____of action involved in the relationship between light exposure, hunger and metabolism.
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