I disagree. Exercise needs to be a learned life-long habit.
You're right, but it's an individual habit that one elects as a life-style. You can make someone move (or exercise)at the point of a bayonet, but I don't believe that's the way to do it. Life-long sports are generally not team sports, and maybe it's a good idea to introduce some students to other options that they'd find enjoyable and would continue with.
