I rode 67 miles on Saturday on a fairly hilly route. I got home and was curious if I had lost any sizeable weight on the ride. Nope I gained about 8 or 9 lbs from the day before. I did eat quite a bit on the ride (fruit, trail mix and a piece of lasagna that the organizer provided at the end), but I doubt I would gain 9 lbs on Thanksgiving. Let alone after a 67 mile ride.