Fuel the Long Run: A 6-Week Gut-Training and Fueling Plan for Marathon and Ultra Runners

This plan is for busy runners who train hard but still hit the wall. You may bonk at mile 16, feel queasy on every long run, skip fuel because gels sound awful, or head out fasted because breakfast feels like too much hassle. Most runners aren't undertrained. They're underfueled, and nobody told them that the stomach can be trained like the legs. Fuel the Long Run is a six-week plan built around your weekly long run. Each week works like a workout. You get a specific carb target per hour, a fueling schedule by minute, pre-run meal options, form-style cues for taking in fuel while moving, and a clear progression from week to week. You'll start with a realistic baseline, then build toward 60 to 90+ grams of carbs per hour. Along the way you'll practice with real foods that work: toasted waffles with maple syrup, Pop-Tarts, chews, fruity candy, and a cold Coca-Cola late in a long effort. You'll also get a backup plan for the day your gels stop going down. The goal is simple. You'll walk to the start line of your marathon or ultra with a fueling strategy you've already rehearsed, a gut that tolerates it, and the confidence to adjust when things go sideways. I'm Amy, a registered dietitian in Minnesota who works with runners every day. I've run 9 marathons and 3 ultras, and I'm still testing this approach in my own ultra training. These aren't theories from a textbook. They're the same strategies I give my clients and use in my own long runs, with tips on keeping them easy enough for a busy week.