“Smartphone, Tablet Use Linked with Obesity in Teens.” News, Harvard T.H. Chan School of Public Health, 22 June 2018, www.hsph.harvard.edu/news/hsph-in-the-news/smartphone-tablet-use-linked-with-obesity-in-teens/.

This Harvard study looks at 25,000 teens between 2013 and 2015 and discovered most of them spend about 5 hours on their phones or tablets. The teens were more likely to drink soda and sleep less than teens who spent less time on their devices. Television is included in the devices. More physical activity and less screen time would benefit teens.