And let me guess, you pay on top of your XBL-Gold subscription right?
Following a limited time unlimited access period for Gold members, yes.
I understand the market for this, but they seriously should have considered making it "free" permanently for Live subscribers. I mean.. by-god, but there are a shit tonne of home based fitness programs out there, even for consoles for that matter.
Wii Fit, the marquee title here, had the value of being something you could buy and use occasionally without much sense of guilt like Brain Age or crystal meth. If you're paying a routine subscription however, you might as well pony up the dough for a gym or fitness centre membership.