Originally Posted by
chaadster
Unless you’re extremely lean, I’d not worry about fueling for those distances. Perhaps some of the fatigue is from burning through glycolitic energy without the aerobic endurance to support it, so working on stamina and getting your body to run on stored energy may help prevent the energy peaks and troughs which make you feel fatigued in relatively short periods.
5'9", 163lbs. So leanish. But I can definitely reduce some fat around the waist line (front and back).