by Dr. Meenakshy Varier on  December 16, 2016 at 10:03 AM Health Watch
  • Screen time with smartphones and tablets increases the risk of obesity as much as watching television.
  • Engaging in use of these hand-held devices increases consumption of sugary beverages, causes lack of sleep and decreases physical activity.
  • Adolescents who spent more time on these devices were 43% more likely to suffer from obesity.

Obesity Risk Increased by Excess Use of Smartphones and Tablets
Children who watch too much television or spend more time on screen devices like tablets and smartphones, are likely to engage in behaviors that can result in obesity.

Previous research has shown that children who watch too much television, increase their risk of obesity. But the screen time only increases due to use of other devices like tablets and smartphones.

Obesity is one of the major health concerns among both children and adults in the United States today. The American Academy of Pediatrics (AAP) suggests that children should not watch more than two hours of television a day.

On an average American children watch television for 2 to 3 hours in a day. Having a television set in kid's bedroom is not unusual for an average American household and this makes it easy for them to have ready access to it.

Television viewing causes obesity by mechanisms like lack of physical activity, increase in fast food consumption, increased calorific diet while watching T.V and reduced metabolism.


Researchers from the Harvard T.H. Chan School of Public Health, Dr. Erica L. Kenney and Dr. Steven L. Gortmaker, studied data from the 2013 and 2015 waves of the Youth Risk Behavior Surveillance System.

It included 24,800 adolescents in grades 9-12.

The survey gathered data on the following:
  • Hours spent on screen devices including smartphones, tablets, computers, and videogames and television.
  • Hours of sleep on an average school night.
  • Number of sugar-sweetened beverages consumed in the previous 7 days.
  • Frequency of physical activity (at least 60 minutes per day) for the past 7 days.

Almost 20% of U.S. adolescents spent more than 5 hours a day on smartphones, tablets, computers, and videogames and only 8% spent more than 5 hours a day of television.

Obesity and poor diet were the effects of watching excess television among adolescents.

Adolescents who spent more than 5 hours a day on screen devices were twice as likely to drink a sugary drink each day and not get enough sleep or physical activity. Their chances of having obesity was 43% more than those who did not spend time on these devices.

What Can be Done

According to Dr. Kenney, "This study would suggest that limiting children's and adolescents' engagement with other screen devices may be as important for health as limiting television time."

Clinicians are encouraging families to set limits for both television and other screen devices.

This study is not a conclusive evidence but the finding that using screen devices results in higher rates of obesity, is cause for concern.

The new study is published in The Journal of Pediatrics.


  1. Television Viewing - A Major Cause of Obesity Among US Children - (//
  2. Erica L.Kenney et al. United States Adolescents' Television, Computer, Videogame, Smartphone, and Tablet Use: Associations with Sugary Drinks, Sleep, Physical Activity, and Obesity.The Journal of Pediatrics; (2016) DOI:

Source: Medindia

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