Sport at school

Some people think that Sport at school is not important. Maybe they think that Maths or Science are more useful in everyday life. What is more important than our heath? Without health we can do nothing else... Sport increases our quality of life and if we get used to doing it at school we will practice it (keep doing it?)
When someone who doesn't usually do Sport decides to do it, it will make them feel better and better each day.
On the other hand, there are people who spend a very long time doing sports just to get a sculpted body. In that case, sport (exercise sounds better than sport here) is not very healthy and it can become to be an illness. This kind of disease is as dangerous as anorexia.