does anyone here rollerblade for exercise...I used to do it a lot but then stopped and grew out of my rollerblades. I'm not sure whether it will be worth it to invest in a new pair or whether I'd be better off doing something a little easier. Also...anyone here do pilates? I know it's not cardio (and it's more of a girl thing), but I find it really helps build muscle and strength without getting me out of breath so quickly.erin (ej820)19/f/cf