Stomach Training

Your gut adapts to what you ask of it, the same way your legs do. Most GI problems during races trace back to trying nutrition on race day that was never used during training. The fix is simple but easy to skip: use your actual race nutrition — gels, chews, drink mix, whatever you plan to race with — on longer training rides. Your stomach learns to process carbs while working hard, and you find out in advance what doesn’t agree with you rather than discovering it at mile 60 of a race.