No oatmeal, no fruit. Try Hammer's Perpetuem for your on-bike fueling. One bottle Perpetuem, one bottle plain water. You couldn't do better than having 300 cal. of Perpetuem for breakfast, too. Get rid of the stuff that's bothering you, including most of the fiber. No fiber, no poop. Eat fiber the day after. Never had that problem once I started fueling this way.