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How school support may help ADHD children. Pixabay

Parents, please take note. If you want your kids to do well in life, limit their screen time to less than two hours, encourage them to do physical activities and to have sufficient sleep, suggests new research.

Following a two-hour screen time limit during childhood and adolescence is particularly important for cognitive development, showed the findings published in the journal The Lancet Child and Adolescent Health.


“We found that more than two hours of recreational screen time in children was associated with poorer cognitive development,” said one of the researchers Jeremy Walsh, CHEO Research Institute, Canada.

The study involved more than 4,500 US children aged 8-11 years.

Children and parents completed questionnaires and measures at the outset of the trial to estimate the child’s physical activity, sleep and screen time.

In addition, children also completed a cognition test, which assessed language abilities, episodic memory, executive function, attention, working memory and processing speed.

The researchers examined how meeting recommendations for 9-11 hours of sleep, less than two hours of recreational screen time, and at least an hour of physical activity every day affected children’s cognition.

The more individual recommendations the child met, the better was their cognition, the findings showed.

In addition, meeting only the screen time recommendation or both the screen time and sleep recommendations had the strongest associations with cognitive development.

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“Behaviours and day-to-day activities contribute to brain and cognitive development in children, and physical activity, sedentary behaviour, and sleep might independently and collectively affect cognition,” Walsh said.

“Based on our findings, paediatricians, parents, educators, and policymakers should promote limiting recreational screen time and prioritising healthy sleep routines throughout childhood and adolescence,” Walsh added. (IANS)


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