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Mobile devices in the bedroom rob kids of sleep - study

Published:Wednesday | November 2, 2016 | 12:00 AM
Remove all electronic devices from your child's bedroom for them to get a full night's sleep

If you want your children to get a full night's sleep, then remove all smartphones, tablets or any other types of electronic devices or screens from their bedroom, revealed a new study published this week in JAMA Pediatrics.

Using a mobile device before bedtime has long been associated with trouble falling asleep and staying asleep, as well as more daytime sleepiness. The light from tablets and phones affects circadian rhythms, making it harder to fall asleep.

The study authors are also reporting that simply having access to a device in the bedroom - even if it is not used before bed - is associated with increased odds of poor sleep length and quality for children.

"Sleep is an often undervalued but important part of children's development, with a regular lack of sleep causing a variety of health problems," study leader Ben Carter from King's College London said in a statement. "With the ever-growing popularity of portable media devices and their use in schools as a replacement for textbooks, the problem of poor sleep among children is likely to get worse."

Already, the researchers report, 72 per cent of all children and 89 per cent of adolescents have at least one mobile device in the bedroom, and most of them regularly use it before bedtime.




For kids, a good night's sleep is defined as falling asleep relatively easily, staying asleep throughout the night, and only waking up after nine or 10 hours of rest.

Keeping mobile devices out of your child's room is no guarantee that they will have a perfect night of sleep, but it can certainly boost the odds of it happening, the authors found in a meta-analysis of 11 different studies that looked at the relationship between kids and mobile devices.

For example, the researchers found that 31.5 per cent of children who do not have mobile devices in their rooms reported that they don't get enough hours of sleep at night, compared with 41 per cent of kids who have access to a device and 45.4 per cent who use their devices just before bed.

They saw a similar pattern for sleep quality, or how hard it is for kids to fall asleep and stay asleep. About 34 per cent of kids with no access to mobile devices at bedtime reported poor sleep quality, compared with 44 per cent of kids who had a device in the sleep environment and 52 per cent of kids who used a device before going to bed.

Kids with no devices in their room also reported less daytime sleepiness than their peers who kept devices in the bedroom.

Although this particular study does not examine why devices interfere with sleep quantity and quality, the authors said it is probably a combination of factors.

They note that digital content can be psychologically stimulating and that light emitted from devices affects circadian timing, making it difficult to fall asleep. As for the effect on sleep of having a device in the room and not using it, experts say that may be due to the 'always on' nature of social media.

Although more work needs to be done to learn exactly how mobile device use can effect sleep, the authors say that the takeaway for parents is to get those devices out of the bedroom, at least during sleeping hours.

"It is imperative that teachers, health-care professionals, parents, and children are educated about the damaging influence of device-use on sleep," they wrote.