Well it was spinning class again last night. We had several first timers in the class so she took it easy on us. Even so, a couple of them only made it for about 40-45 minutes before they bailed. My #s reflect that we didn't work as hard...mainly because she gave us longer recovery intervals to help the beginners. 1 hour and 5 minutes, Max HR 87% of max, avg HR 72% of max, 743 calories burned.