2.Cause they want to feel well, look smart, build up their stamina and just to have fun and waste some time.
3. If you do sport regularly,soon you will see a good result.The main word is "regularly"
4.In Britain the most popular kinds of sport are rugby, football and cricet. In Russia- valleyball.
5.I like figureskating.This kind of sport looks so elegantly and amasing.I prefer to watch it on TV