How can screen time contribute to childhood obesity?

Screen time contributes to childhood obesity primarily by fostering sedentary living habits that significantly reduce a child's daily caloric expenditure.1

When children spend excessive time engaged with screens—such as watching television, playing video games, or using computers—they are not participating in calorie-burning exercise. This lack of physical activity, when combined with the consumption of high-calorie, processed foods, creates an energy imbalance where caloric intake exceeds the amount of energy burned.1

Research has highlighted that this sedentary behavior is a major factor in the modern rise of obesity. For instance, surveys have shown that many children spend several hours daily on screen-based activities, which displaces time that could otherwise be spent on active play. Ultimately, childhood obesity is driven by the complex interaction of these environmental and behavioral factors, where reduced physical activity levels play a critical role in weight gain.1