The enormously popular video game Fortnite gives rise to hours-long marathon playing sessions—and now there’s evidence that it creates health problems in young players as well.

According to pediatricians, children who play Fortnite and other games for extended stretches are more prone to sedentary obesity, carpal tunnel syndrome, behavioral changes, sleep deprivation, and even hypertension. Recently the World Health Organization designated so-called “game disorder” as a diagnosable medical condition. Limiting screen time is a widely recommended way for parents to address the problem.

Click here to learn more about the World Health Organization’s recent designation of “gaming disorder” as a diagnosable condition.