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New research shows that sleep and screen time change impulsive behavior.
Posted Sep 19, 2019
Children who struggle with impulsive behaviors want to do well, but find themselves repeatedly getting in trouble. Kids with ADHD find that their bodies want to move and they act before they think, not because they lack self-control, but because of they way their brain works. Current thinking holds that the impulsivity that is a hallmark of ADHD has to do with deficient inhibitory mechanisms in the brain. In other words, the brain doesn’t turn off the kids’ impulses the way it does for the rest of us. A new study gives us insight into some practical things parents can work on at home to help their kids do well.
This is the first study to show that combined sleep and screen time behaviors impact impulsivity.
Kids with impulsive behavior disorders struggle to control themselves even when they want to.
Source: Photo by Vance Osterhout on Unsplash
The Healthy Active Living and Obesity Research Group at the Children’s Hospital of Eastern Ontario looked at more than 4,500 kids aged 8-11. The team used the Canadian 24-hour movement guidelines for children, which are essentially the same as what pediatricians advise in the U.S. The goals are 9-11 hours of a sleep a night, 2 hours or less of recreational screen time a day, and at least 60 minutes of moderate to vigorous physical activity a day. In other words: get enough sleep, don’t sit around on screens all day, and get that heart rate up enough to break a sweat. Kids who do all of this have think and plan more effectively, are less likely to become obese and have better quality of life compared to kids who didn’t do any of them.
This study focused specifically on impulsivity, like breaking rules and risky behavior. While prior research has looked at individual habits when it comes to impulsivity, this “study is the first to show that adequate sleep and reduced ST are linked with less impulsive behavior among children.” When kids get enough sleep and don’t overuse screens, they behave less impulsively.
Why impulsivity matters.
Impulsive behavior means acting without thinking or being unable to delay gratification. An impulsive child does things they regret when they think about it, and can’t wait for what they want. Impulsivity is not just a problem for kids with ADHD, it’s also a key feature of several important psychiatric complaints. For instance, impulsivity is thought be important in possibly leading to and continuing eating disorders, substance abuse, and suicidal attempts in kids.
If we can identify the factors that impact impulsivity, we can modify those factors and help our kids. This study shows that when kids get enough sleep and limit screen time use they behave less impulsively. For example, they were better at finishing their homework or controlling themselves when they were upset.
The findings certainly suggests that limiting screen time and promoting sleep could help to prevent impulsivity problems for our kids, but the study did not actually prove it. Further research is needed to see if changing things will actually help impulsive kids who sleep too little or use >2 hours of screen time for fun. In the meantime, it just makes sense for parents to do their best to follow the guidelines on sleep, screens and exercise.
Michelle D. Guerrero, Joel D. Barnes, et. al. (Sept. 2019) “24-Hour Movement Behaviors and Impulsivity” Pediatrics.