Spinning class again last night. 48 minutes, max 88% of max HR, avg 78% of max HR, 743 calories burned. The instructor came in and said "this is my third class of the day so my legs are cooked...do you want hard moderate or mellow?" We all said "you know we will do whatever you tell us to do, so you pick." He didn't let up on us at all...but it was fun as always.