I know some people think this is cheesy but I love it. I calculated the calorie burn with my body weight and intensity level and I burn about 500 calories per class. It's fun too because our instructor plays the best music. The hour flies by. Anything that makes exercise fun and makes you sweat a gallon I'm all for. So if you're out there thinking about ways to get your cardio in just take the plunge and shake your butt too zumba. FYI- you can also show your fiance some of the moves you learned. Mine appreciated it!