For one thing; you can never bulk up as a woman like you might be picturing unless you're doing some really hardcore stuff. Meaning lifting immense amounts of wieght and constanting doing strength workouts. And not to mention you'd actually have to be taking steroids alongside all that. So it's actually toning your
body while increasing
energy, endurance, and not to mention metabolism. But if it's stop working than that must mean it
was working at a time?
Maybe it's gotten to be too routine and your muscles have gotten used to the moves. So you might want to try something different just to shake your muscles a little bit with some new moves or just do the tae-bo tape less and replace it with some
cardio or whatever you'd like.