Swimming
These are some AWESOME sites on swimming:
http://www.freeolympicgames.com/olympic/Swimming-olympic-games.html
Swimming is a great sport to get you in shape. Sure you can just play in the pool and call that swimming, but real swimming takes hard work, persistance, and practice. Joining a team is a great way to stay in shape. Though, when your in a swim meet (where you race against other teams) they can last long. But still swimming is a great way of excercise.