comcast fitness on demand..

I've used some of the fitness on demand on comcast. The thing to look out for is the duration of the workouts. A lot of them are sort of sneak peeks at what the workout is like, not a full workout. The fitnesstv ones are usually longer, with many 20 mins or more, but a lot of the well-known workout personalities have just sneak peeks to get you interested in their video (usually less than 10 mins in length). When I pick one that I know is short, I just force myself to do at least three of them to get enough exercise. The fitnesstv ones are my faves though. Hope this helps a little!