The cause of disturbed sleep may not be looking at your smartphone before bed, but “looking at your smartphone in bed” – GIGAZINE

In order to improve the quality of sleep, some people may say, “I try not to use my smartphone too much before bed.” However, a new study suggests that the cause of sleep disturbance is not looking at a smartphone before bed, but “looking at a smartphone in bed.”

Screen Use at Bedtime and Sleep Duration and Quality Among Youths | Sleep Medicine | JAMA Pediatrics | JAMA Network
https://jamanetwork.com/journals/jamapediatrics/article-abstract/2822859

Children who watch screens in bed have the most disrupted sleep – Earth.com
https://www.earth.com/news/children-who-watch-screens-in-bed-have-the-most-disrupted-sleep/

In general, using digital devices such as smartphones and tablets before bedtime is said to delay falling asleep and reduce the quality of your sleep. Therefore, a New Zealand research team investigated whether screen time before bedtime affects children’s sleep duration and quality.

The research team is based in New Zealand’s South Island.DunedinA survey was conducted to measure screen time before bedtime among 79 children aged 11 to 14 living in the United States. In the study, children’s screen time was measured for four consecutive days from two hours before bedtime until they closed their eyes to go to bed using a wearable camera worn on their chests and an infrared camera installed in their rooms. In addition, the subjects wore accelerometers on their wrists to measure sleep time and sleep quality.

As a result of the survey, it was found that all children except one looked at screens such as smartphones before going to bed. However, two hours of screen time before bed had little effect on total sleep time or quality for the day.

Additionally, more than half of children used a smartphone or tablet in bed, and one-third used a device after a failed attempt to fall asleep. Interestingly, screen time in bed was associated with delayed sleep onset and decreased overall sleep time.

According to the research team, the effects of using a smartphone or tablet in bed were particularly noticeable for activities such as gaming and multitasking. be the first author of the paperUniversity of Otago“Screen time after bedtime affected sleep, with kids falling asleep as much as 30 minutes later and getting less sleep that night,” said Dr. Bradley Brosnan of states.

The results of this study suggest that using a smartphone or tablet before bed may disrupt your sleep, not because of blue light, but because it simply delays the time you start falling asleep. I’m doing it.

“A simple sleep guideline is to keep devices out of the bedroom. It’s okay to allow your child to use a device before bed, but not in bed,” Brosnan said. I did.