When I first starting spinning I could only just sit and pedal and I bet I only burned about 200 calories but I stuck with it. For me it really hasn't gotten easier because I just turn up the resistance and work harder.
For me the order of calorie burn in the classes offered at the club have been: #1 Spin, #2 Bootcamp, #3 Zumba, #4 Body Works and #5 Step.

