Pilates

I tried Pilates today for the first time ever. I liked it, however I really didn't feel like I got a workout?? Is this how you are supposed to feel? And it was probably not the best time to try this type of exercise with my said knee problem. Anyway, for all you people out there that incorporate Pilates into your every day routine I (or should I say a co-worker found) a really cool website that will calculate the amount of calories you burned during your session. Give it whirl it's over there on my side bar!