Yeah I realize the calories burned numbers can be wrong. I use two methods - one is my garmin HRM and the other is an online chart - I figure as long as they're reasonably close, I'll go with it. Most weeks I burned 4500-5000 calories. That week I burned 9000 was the week I did a century ride plus I rode another 225 km the rest of the week. I did about 14 hours of riding that week, plus an hour of running. (Not a usual week.