telebianchi , I eat pretty well on the rides. For example, last weekend I did the Solvang Century. Stopped at each rest stop and had some fruit and a couple of fig newtons, and had a bottle with spiv in it. I also had some gels to take between stops, so no fear of starvation there. The fatigue I am talking about is more an emotional fatigue that sets in around the mile 70-80 mark. I've tried different visualization and motivation strategies that seem to help, but the interest in the 5 hour was to see if it could give a slight physical "kick" to help me over that phase.