i take a couple spin classes a week now that the weather has changed, and I have yet to do anything crazy like pushups on the bars or waving my hands in the air. My Monday class I take is on the easier side, more geared towards fitness, my Friday class is much more challenging, and is modeled after a real ride. Her class is really popular, I have to get there pretty early to get a spot. I've taken some pretty boring ones too, it took a while to find the right teachers.