In the study, data was analysed from 4,520 children from 20 sites across the US.
However, only one in 20 USA children aged between 8-11 years meet the three recommendations advised by the Canadian 24-hour Movement Guidelines to ensure good cognitive development - 9-11 hours of sleep, less than two hours of recreational screen time, and at least an hour of physical activity every day.
Walsh said although kids who spent more than two hours in front of screens were linked to poorer cognition, he warned more research is needed to study the impacts of different forms of screen time, such as educational versus entertainment experiences.
The questionnaire found that children that met all three recommendations or met the sleep and screen-time recommendations - or just met the screen-time recommendations - performed noticeably better than children who met none of them, or met other combinations of the guidelines. Children and parents completed questionnaires and measures at the outset of the trial to estimate the child's physical activity, sleep and screen time.
A new study revealed only one in 20 children in the United States followed the guidelines on exercise, sleep, and screen time, while approximately almost a third are outside recommendations for all three.
Researchers kept in mind other factors that may have influenced the results such as the net household income, race and ethnicity, the body max index and other useful indicators, but they can not claim that the study is completely accurate. The guidelines recommend nine to eleven hours of sleep for children ages 5 through 13. In addition, meeting only the screen time recommendation or both the screen time and sleep recommendations had the strongest associations with cognitive development. Based on that, the study showed that these children were able to score better on the puzzle cognitive tests.
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A new study reports that only one in 20 kids in the United States meets guidelines on sleep, exercise and screen time, and one-third of kids are outside recommendations for all three.
Research suggests teens who spend more time using social media and the internet, while avoiding socializing, ports, or schoolwork, had "lower psychological well-being".
Even though some facts are not entirely or accurately proven, everybody knows that leaving your child in front of a tablet or a TV the whole day is not healthy for them.
The authors note some limitations, including that their study is observational so can not establish the underlying causes or the direction of the association.
The article's co-author, Dr Jeremy Walsh, explained in a podcast that "regardless of content, keeping our screen time to less than two hours per day might be beneficial for cognitive health".