Wow, I think everyone summed up what I think a spin class should be. I do however like to do super spins and high cadance work every now and then. I feel so slow riding next to some people because they seem to be flying. But when I take my resistance back down to moderate they are toast. Never really thought that some of those people are using only no or up to three turns. Until the instructor told people to go down to the tensions I use to keep my heart rate up and suddenly most could barely pedal.