ava - I think that the specs given on Workout (I saw that episode) are actually a little stricter considering the woman on that show are professional trainers. Personally I think 19% bmi for a young woman is a little bit low - if you got down to 13% its a different ballgame. Although people come in different sizes, and if someone is naturally smaller/thinner, it could be totally healthy for their frame. Thats why its hard to tell from a single range whats best for everyone, you know?
As for exercises - the step videos are pretty good. I can't do those because they hurt my shins, but my mom did those for years when we lived in a tiny apartment. You only need a small area around the step itself for doing lunges, etc. Its a great workout tho.
The morning star always gets wonderful bright the minute before it has to go --doesn't it?