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PHILADELPHIA (CBS) —  Researchers have found that staring at screens could be hurting children’s brain function.

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The new, observational study looked at data from a broader study funded by the National Institutes of Health and focused on 4,500 American children.

Children involved in the study were between the ages of 8 to 11 and from 20 different locations.

Credit: CBS3

The study, which was published last week in the journal The Lancet Child and Adolescent Health, found only one in 20 children in the nation met all three guidelines.

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Nearly one in three met none of the guidelines.

The study concluded that kids who slept well and were more active also showed better brain function.