It's definitely worth it. The one thing we need to do is find something we enjoy, and something we will see through. One of the popular exercises around campus is walking. Easy to do, and very fulfilling. Walking works a lot of major muscle groups and also speeds up your metabolism.
Swimming is also a good choice of exercise.
The pool in the Hanner Fieldhouse is open to the public a few hours a day. And you can always go to Weight Extension or Fitness Extension. I.D. One of my friends teaches aerobics at the Fitness Extension, and the class is pretty good. Another alternative is to walk or ride a bike to class a few times a week. So if your looking to get rid of a few extra pounds there are plenty of things to do.