Spin class pushed me higher-faster. On the intervals you're encouraged to push it up to 110-120, you find you're rarely dropping below 85. It translated over to real riding almost immediately. As annoying as spin class was, it served several purposes; cadence, good for practicing aggressive out the saddle sprints, my spin set-up was bars many inches below the saddle ...which helped me to get comfortable in the drops and lowered my bars. Easy peasy way to change your riding style. And, if you not enjoying it you simply get off and take a steam.