More than 4 hours of daily smartphone use associated with health risks for adolescents
In a new study of more than 50,000 Korean adolescents, those who used a smartphone for more than 4 hours per day had higher rates of adverse mental health and substance use. Jin-Hwa Moon and Jong Ho Cha of Hanyang University Medical Center, Korea, and colleagues present these findings in the open-access journal PLOS ONE on December 6, 2023.
Prior research has shown that smartphone use among adolescents has increased in recent years, and that this usage may be associated with higher risk of adverse health—such as psychiatric disorders, sleep issues, eye-related problems, and musculoskeletal disorders. However, growing evidence suggests that at least some daily internet usage ...













