Almost everybody takes part in some kind of sports nowadays. Would it be Football, Hockey, Basketball, Baseball, Tennis. There are hundreds if not thousands of sports in the world.
Sports are kind of like an identity question. You can really tell about a person just from the sport they are playing.
For example, you can clearly tell if someone plays American football or hockey. They are usually fairly big and physical people.
Watching sports is also popular, and even more popular if your country or team does good in it.