Originally Posted by
chasm54
I don't think so. It takes exactly the same amount of energy to move a fit 200lb athlete 15 miles at 15 mph as it does an unfit 200lb athlete.
Maybe. But what I meant is: When I first started riding at 220 lbs and out-of-shape, I burned a lot more calories on a shorter, slower ride, than I do now at 180 lbs. and being much more fit. Granted, I go faster and further now in the same time....but if i were doing the same ride at the same speed that I started out doing, I'd probably burn half the calories that I burned then.