Originally Posted by
DrIsotope
Not really. The body has plenty of stored glycogen to handle even a spirited ride of several hours. My problem is, on days when I do get out and ride before breakfast, starting about 4 hours after I get home, I want to eat everything in sight. I much prefer my normal breakfast, then riding around 1 hour after. I can get ~4 hours of riding with no dramatic increase in hunger.
This was my reaction to riding fasted too but eventually I learned to curb my voracious appetite after a spirited ride and still lose some weight without suffering during a ride.