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Screen time: Overview


The technology children have access to today is changing their world and providing them with endless opportunities. The downside is that it is very easy for children (and even adults) to experience an overload of information and forget about other fun and healthy activities.

Recent research from the Healthy Active Living and Obesity Research Group in the Children’s Hospital of Eastern Ontario indicates that Canadian school-aged children spend 65 to 80 percent of their waking hours engaging in sedentary behaviour. Another study found that Canadian children and youth aged six to 19 spend 62 percent of their waking hours being sedentary.

Together, these studies show that most young children engage in activities that involve little physical movement or use of energy. This pattern can be partly explained by the increasing amount of screen time in our daily lives.

What is screen time?

Screen time is the amount of time your child spends using a device that has a screen. It includes time spent watching television, browsing the internet, using a cell phone and playing video games. But regardless of the device, most screen time limits a child’s opportunities to get active outside the home. Over time, this low level of physical activity can threaten their health.

How screen time affects physical and mental health

Screen time has been linked to lower levels of physical fitness and problems with mental health and social development.

  • Children who spend more time in front of a screen tend to have higher obesity rates than children who spend less time in front of a screen.
  • Children and teens who watch more than two hours of TV a day have lower scores of self-esteem.
  • Higher levels of screen time have been linked to lower school performance. This is partly because those who watch higher amounts of TV tend to spend less time doing homework.

High levels of screen time can also affect a child’s nutrition. Although not all children eat or snack while they watch television or use other devices, screen time can sometimes encourage unhealthy eating habits. For instance, if your child is distracted by a television show or video game while they eat, they may not be able to recognize when they are full. It is also easy for your child to associate screen time with enjoying a favourite food.

While active video games are advertised as a good way to encourage physical activity, children and teens quickly learn how to play using minimal gestures (for example using wrist movement only). This greatly reduces the amount of energy they use.

How much screen time is 'too much'?

Daily screen time recommendations largely depend on the age of the child. The Canadian Paediatric Society and the Canadian Society for Exercise Physiology (CSEP) recommend the following daily limits.

  • Children under age two: no screen time
  • Children aged two to four: less than one hour a day of screen time
  • Children and teens aged 5 to 17: maximum of two hours a day of recreational screen time (watching television, messaging friends or playing computer games)

Screen time is an important and unavoidable part of your child’s life, especially as they get older. For instance, older children may need to spend more time on a computer to complete homework or on their phone to stay in touch with friends. There are also different types of screen time: using a phone or computer to video call a family member has a different effect on a developing brain than watching a stream of videos.

Associations such as the American Academy of Pediatrics have taken account of the growing presence of technology from the early years. Rather than set daily limits by age group, its recommendations now focus on the role of parents to set limits, use their judgment about the quality of screen time and model healthy behaviour. It is likely that more research into screen time will be needed as technology continues to evolve.

How to calculate your child’s current daily screen time

Calculating the amount of time your child spends looking at a screen on a normal day will help you find out if you need to set limits on screen time​ and encourage them to spend more time on other activities.

Screen time for a normal day means the amount of time your child spends looking at a screen from the time they wake up until the time they go to bed. You can calculate this by adding up the time spent on the following activities.

Screen time activity Examples
Watching television
  • Watching cartoons, reality shows, sports, documentaries, news, game shows, talk shows, movies
Using the internet
  • Watching videos
  • Watching streamed TV shows or movies
  • Instant messaging
  • Downloading music
  • Playing online games
  • Using social media websites and apps
  • Downloading music
Using a computer or tablet
  • Reading or writing documents
  • Playing a computer game
  • Creating a drawing in a computer program
  • Browsing or editing photos
  • Listening to or organizing music files
  • Writing computer programs
Using a cell phone or smart watch
  • ​Reading and writing text messages
  • Playing games
  • Using apps
  • Listening to music
Playing games
  • ​​​Using a gaming station
  • Using a children's camera with built-in games

How to tell if your child has too much screen time

Screen time becomes unhealthy when your child is glued to a screen for most of the day. If your child’s screen time falls outside the recommended limits for their age, you may notice some telltale signs.

Children and teens who spend too much time in front of a screen may seem:

  • lonely
  • sad
  • overly tired
  • stressed or fearful
  • isolated from friends or family
  • withdrawn
  • nervous
  • agitated or tense
  • aggressive or angry.

They may also experience emotional outbursts and have difficulties making and keeping friends.

Some children also have difficulties concentrating and lose interest in school, following rules or doing other activities. The lack of physical activity that results from too much screen time can also cause frequent back pain, headaches or stomach aches.

Some of these issues may have causes other than excessive screen time. See your child’s doctor if you have any concerns about your child’s physical or mental health.

Key points

  • Screen time is the amount of time your child spends using a device that has a screen such as a TV, computer, games console, tablet or smartphone.
  • The recommended amount of screen time depends on a child’s age. Children under two should not have any screen time and those under aged five and under should have less than two hours a day.
  • Spending too much time in front of a screen can negatively impact your child’s mental health. Signs include feeling sad, overly tired, withdrawn or uninterested in other activities.

Further information

For more tips on maintaining your child's mental health, please see the following pages:

Phy​sical activity: Guidelines for children and teens​

Physical activity: Benefits of exercise for health and wellbeing​

Sleep: Benefits and recommended amounts

Sleep tips: How to help your child get a good night's sleep

Sleep tips: How to help your teen get a good night's sleep

Screen time: How to help your child set healthy limits

Nutrition: How a balanced diet and healthy eating habits can support your child's mental health​

Samantha Metler, MA

Suneeta Monga, MD, FRCPC



Brown, A., Shifrin, D.L., & Hill, D.L. (2015). Beyond ‘turn it off’: How to advise families on media use​. AAP News

Canadian Society for Exercise Physiology (2016). Canadian 24-Hour Movement Guidelines for Children and Youth: An Integration of Physical Activity, Sedentary Behaviour, and Sleep​. ​

Colley RC. et al. (2011). Physical activity of Canadian children and youth: accelerometer results from the 2007-2009 Canadian Health Measures Survey. Health Reports. 22(1), March 2011: 15-23.

Leatherdale, S.T., & Ahmed, R. (2011). "Screen-based sedentary behaviours among a nationally representative sample of youth: are Canadian kids couch potatoes?" Chronic Diseases and Injuries in Canada. 31(4): 141-146.

Tremblay, M.S. et al. (2011). "Systematic review of sedentary behaviour and health indicators in school-aged children and youth​." International Journal of Behavioral Nutrition and Physical Activity. 8: 98. doi:10.1186/1479-5868-8-98.