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The study, conducted in collaboration with the Netherlands Institute of Neuroscience, the UMC Amsterdam and the Netherlands National Institute of Public Health and the Environment, examined the use of screen time among Dutch teenagers aged 12 to 17 years old. The researchers divided the group of teenagers into two groups: frequent users of screens (those who recorded an average of four hours per day on the screens) and infrequent users (those who watched the screens approximately one hour per week). day). They then examined how these teenagers slept when they used their phone normally before going to bed, when they were wearing light-goggles when they used their phone before going to bed and when they were out. They completely refrained from using a screen before going to bed.
After five weeks, the researchers discovered that the biggest sleep switch was blue light, emitted by screens of all kinds. Blue light can affect the clock of our brain by disabling the production of melatonin, which gives us the impression of not being tired. Thus, researchers discovered that the use of goggles against the light or the use of a protective screen resulted in the sleep of participants 20 minutes earlier. The change was also quick: teens reported that they slept better after only a week of using glasses or baffle screens before going to bed!
"Teens are spending more and more time on screen-based devices, and sleep complaints are common in this age group," said Dirk Jan Stenvers, a researcher in the Endocrinology Department. Metabolism of the UMC of Amsterdam, in a statement. "We show here very simply that these sleep complaints can be easily resolved by minimizing the use of the evening screen or exposure to blue light. According to our data, it is likely that teen sleep complaints and their sleep retardation are at least partly mediated by blue light screens. "
The researchers plan to repeat this study on adults later.
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