I recently joined an aerobics class for babies and moms. As an Aspie who's a bit uncoordinated, this has been an interesting experience. It often seems that I have a difficult time following some of the instructor's demonstrations of different exercises. I have to watch her for longer than the other class members to be able to imitate the movement. Not sure if this has anything to do with Asperger's or not.
I am also horribly out of shape, so I am using the lightest resistance on the muscle exercises, often become worn out before the other members of the class. When we do walks around the area with our strollers, I am also often the last person to finish the lap.
However, I still feel great about myself for doing the class. Even though I'm almost always last, and I probably look goofy doing the exercises, I remind myself that I could just be sitting at home not exercising at all. This makes me feel like I'm not really finishing last at all.
I would really encourage you all to join a gym or exercise class. I think it's so easy for us Aspies to want to sit at home with our books, computers, video games, etc. But, it's very important to take care of your health. If joining a class or gym is not an option or is not appealing, there are a variety of exercise or yoga DVDs that you can do in your home.