I am getting fat. Since I graduated college, I don't know what to do and I don't really know anyone to work out with. Here's the thing: I can't run or do elliptical machines. I just get so bored and I can never commit to it. I love racquetball, but I don't have anyone to play with. Can you guys help me brainstorm some cardio exercises that are more...contained? The thing is I need to have a start and end point. Like biking around a particular path, or winning X number of games. What are exercises that you guys can do by yourselves and stay motivated?