The study, which was published in the journal Environment International, was conducted by researchers from Birkbeck, University of London (Birkbeck), Imperial College London, Swiss Tropical and Public Health Institute (Swiss TPH) in Switzerland, and the University of Lincoln.
The researchers found that preteens who use their mobile phones or watch TV in the dark at least one hour before bed are at risk of not getting enough sleep, unlike other preteens who use these devices in a well-lit room or those who don't use them at all before bedtime.
This study is the first to examine the joint effect of the pre-sleep use of media devices with screens and room lighting conditions on the sleep quality of pre-teens.
The results of the study suggest that the nighttime use of phones, laptops, and tablets is consistently linked to insufficient sleep, poor sleep quality, and poor quality of life. Researchers warned that this is a serious matter, especially since insufficient sleep is also associated with impaired immune responses, anxiety, depression, and obesity in both children and adolescents.
For the study, researchers collated data from 6,616 adolescents aged 11 and 12. Over 70 percent of the preteens reported that they use at least one screen-based device one hour before their bedtime.
The adolescents were instructed to self-report on various factors, which included:
The study revealed that the preteens who used a phone or watched TV in a room with a light on were 31 percent more likely to get less sleep than those who didn't use a screen. However, the likelihood skyrocketed to 147 percent when they watched TV or used their phones in the dark. (Related: Kids who spend 4 hours a day on gadgets are twice as likely to get LESS sleep.)
About 90 percent of adolescents worldwide don't get the recommended nine to 11 hours of sleep per night. This percentage has coincided with an increase in the use of gadgets.
Earlier research suggests that sufficient sleep duration and quality are crucial during childhood to maintain physical and mental development. Sleep is also important for cognitive processes. Insufficient sleep is directly related to poor academic performance.
Dr. Michael Mireku, the study's lead author and a researcher at the University of Lincoln's School of Psychology, said that the study highlights the importance of good sleep quality for the health of preteens. Mireku noted that parents, teachers, health experts, and adolescents themselves need to know more about the potential health issues concerning screen use during bedtime, such as insufficient sleep and poor sleep quality.
Everyone needs to get enough sleep every night to maintain their overall well-being. If your kids have trouble falling asleep, try some of the tips below to improve their sleep habits.
Set a good example for your kids and refrain from using your phone one hour before bedtime to teach them good sleeping habits.