Children between eight and eleven who use digital screen gadgets for less than two hours a day performed better on mental ability tests, according to a study published in The Lancet (Child and Adolescent Health).
The study included approximately 4,500 children in the United States aged 8 to 11 years and measured their habits compared to the Canadian Guide for 24 hours of children and youth.
He found that 51% of children received the recommended nine to 11 hours of uninterrupted sleep per night, 37% met the recreational screen time limit of two hours or less per day, while 18% met the recommendation of physical activity of at least 60 minutes of accumulated physical activity per day.
The limitation of recreational screen time of children less than two hours a day, together with sufficient sleep and physical activity is associated with better cognition.
The researchers concluded that more work is now needed to better understand the effects of different types of screen use in children under the age of 11, and recognize that their observational study shows only an association between screen time and cognition and not You can prove a causal link. (See also: The blue light of the screens would cause long-term blindness)
The study questioned the 4,500 children about physical activity, sleep, recreational use of the screens. They also completed tests of language, memory and attention, and the scientists divided the population sample between household income, education of their parents and that of children, ethnicity, body mass index, hormonal development and brain traumas.
According to the BBC, children who had less than two hours of recreational screen time every day slept nine to 11 hours and performed at least one hour of physical activity better than those who did not.
Less than two hours of screen time per day was the factor most related to better performance in the test.
Dr. Jeremy Walsh of the CHEO Research Institute in Ottawa, Canada, told the media: “Based on our findings, pediatricians, parents, educators and politicians should promote the limitation of recreational screen time and prioritize healthy routines. of sleep during childhood and adolescence “.
The study took data from the adolescent brain cognitive development study sponsored by the National Institutes of Health and included surveys by parents on how many hours of sleep a child had, how often they were physically active, and how much time they had. screen they had.
Walsh believes that 30% of participants who did not comply with any of the guidelines are the ones who have more to gain from adjusting daily behaviors.
“They can benefit more because they are not receiving any of the benefits derived from complying with these guidelines,” Walsh told CNN.