Korean Teens Face Health Crisis as School Years Worsen Bad Habits

The health of Korean adolescents is declining as they move through school. A recent study highlights worsening habits in diet, exercise, and substance use. Trends show increased risks from primary to high school, with sharp rises in smoking, drinking, and digital overuse.

Physical activity among Korean teens remains low, with only 13.5% meeting the daily recommendation of 60 minutes. Their diets also deteriorate over time. Meanwhile, substance use grows more common as students age.

Smoking rates jump from 0.35% in sixth grade to 9.59% by the second year of high school. Drinking follows a similar pattern, with 60.8% having tried alcohol and 33.7% consuming at least one full glass. The shift from elementary to middle school marks a critical period for first exposure to harmful substances.

Peer influence plays a major role in these behaviours. Teens are far more likely to start smoking or drinking if their friends already do so or hold permissive attitudes. Another concern is e-cigarette use, which in 2024 surpassed traditional smoking among high school girls for the first time.

Beyond substance use, 35.1% of adolescents show signs of smartphone overdependence. Anxiety is also prevalent, with 8% reporting moderate or higher levels of distress.

The findings reveal a steady decline in adolescent health across school years. Poor physical activity, rising substance use, and digital overuse present growing challenges. Schools and policymakers now face the task of addressing these trends to improve long-term well-being.