I have been a cycling instructor for four years. I was given a one hour time slot to teach my class, so with warm up and cool down, I usually go around 55 minutes. Another instructor at the same facility has classes that last 45 minutes. The head of the department has asked us to come up with a consistent length for our classes. The members want 55 minutes. How long do most spin classes usually last? Are there advantages to classes being a certain length? I figure if the members want a longer class, and I'm given the time frame, I'm going to take advantage of it. Any thoughts and comments would be appreciated! Thanks!