Last month Dh and I did a 40 mile ride. We rode to a health food store/restaurant and back (20 miles each way). Even though I had had a good breakfast 2 hours earlier, I got so HUNGRY on the way there that I ate a HUGE platter of brown rice, scrod filet, steamed veggies, and a roll. Had a real carbohydrate attack. Rode back the 20 miles with no problems at all, maybe because I was so hungry? Drank plenty of water with it all.