New Study Reveals Hidden Risks of Screen Time for Children. A new study has raised international concern by linking high screen time in children to serious long-term health risks. Researchers now warn that extended use of digital devices such as smartphones, tablets, and televisions may significantly increase the risk of heart disease and Type 2 diabetes in children and adolescents.

Published in the Journal of the American Heart Association, the study shows that even one extra hour of screen exposure per day can raise the risk of key cardiometabolic conditions. These include high blood pressure, insulin resistance, and elevated cholesterol levels—major factors that can lead to chronic diseases later in life.

Researchers at the University of Copenhagen analyzed the screen time and sleep patterns of more than 1,000 children aged 10 to 18. The results showed a clear and measurable link between sedentary screen use and rising health risks. Lead researcher David Horner explained that children who spend an additional three hours a day in front of screens face a much higher risk of developing early-stage metabolic conditions. These health risks, he warned, could easily extend into adulthood if no action is taken.

Every hour counts: More screen time, more health danger

Horner pointed out that the issue goes beyond just the number of hours spent on devices. Increased screen time often replaces physical activity and disrupts healthy sleep habits—two key pillars of child development. The study also found that children who sleep less or sleep poorly due to late-night screen use are even more likely to suffer from early signs of cardiovascular disease and diabetes.

The findings come at a time when children worldwide are relying more heavily on digital devices for both learning and entertainment. This shift, accelerated by the COVID-19 pandemic and online schooling, has prompted health experts and education policymakers to take a closer look at the long-term effects of excessive screen time.

Medical professionals are now urging parents and caregivers to take proactive steps. They recommend cutting back on non-essential screen use, encouraging daily physical activity, and establishing consistent bedtime routines. These small but important changes can help reduce the impact of digital overexposure and support healthier lifestyles for children.

This concern is not limited to Western countries. In Pakistan and across South Asia, digital device usage among children is rising fast, especially in urban areas. Experts in these regions are calling for urgent public awareness campaigns and school-based education programs to teach healthy screen habits from an early age.

Researchers agree that technology plays an important role in modern education and daily life. However, they stress the need for balance. Without regular physical activity and quality sleep, excessive screen time can lead to serious and irreversible health issues. The study urges policymakers, educators, and healthcare leaders to promote digital wellness strategies that protect children’s health now and in the future.