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The World Health Organization (WHO) says that 80% of the world's teens don't get enough exercise to live healthy lives. The report was based on research done with students aged 11 to 17 in146 different . The WHO has been studying teen activity levels since 2001 and reports that not much has since then.
The WHO says that kids should get at least hour of exercise every day. This could include walking, running, biking, , playing sports or many other activities.
More and more research that exercise doesn't just help the body, it can help the brain, too.
One big for the lack of activity in today's teens is technology, such as smartphones, computers and TVs. Many teens find it very hard them to pull themselves away from playing games, or watching videos or movies.
The WHO warns young people need to do playing in the digital world, and more playing in the real world. Teens should take part in sports, on official teams or just playing around in the playground.
Experts believe that it's very for young people to fall into these habits now, because the positive effects of those habits can carry on into adult life.
