Exercise Bikes
Have you ever bought an exercise bike? They are really cool, you do not have to put much pressure on any part of you body when you are using them.
I use them to get in shape, and once I am in shape I use them to stay in shape. Exercise bikes give you a great cardio workout, along with making you legs strong. I really like using an exercise bike, but I still believe that jogging or running gives you a better workout.