Good for you! And yeah, it's hard to remember that cardio is just cardio - I took a kickboxing class where the guy really cared about form, and then one where it really didn't matter. :) Stick with it - and if you're looking for a bra, I've always loved Lululemon, as they have full-support ones that work really well (there's one in Bethesda).

And the elliptical trainer you were on yesterday - that's one of my favourites. I need to work out more.