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Gut Training: train your digestive system with Campus Coach

Months of training deserve a race without surprises. Gut Training is training your digestive system. Campus now incorporates this logic into your training plan.

Published on Nov 17, 2025

nutrition screen stages exercise duration

What exactly is Gut Training?

Gut Training is training your digestive system. The principle is simple: gradually train your body to absorb and tolerate the energy you consume during exercise.

When you run for a long time or at high intensity, your carbohydrate stores are depleted. To maintain your pace, you need to fuel during the run. The problem is that many runners have never trained their stomach to digest during exercise, which causes digestive issues on race day.

Gut Training prepares you for that. By fueling progressively and in a structured way during training, you teach your body to manage energy intake without discomfort. Result: on race day, your stomach keeps up and you stay focused on your performance.

Why is it important for your race?

Whether you’re preparing for a half-marathon, a marathon, a long trail run, or an ultra, fueling during exercise is a key factor in success. Many DNF's in races are not linked to the legs, but to the stomach. Poorly managing your nutrition during exercise means risking everything after months of preparation.

Gut Training helps you push back the famous “wall”, maintain your pace longer, and cross the finish line in the best possible conditions. It’s a real advantage, and yet no other running app includes it in its training plans.

How does it work in Campus Coach?

A system of gradual steps

When you activate the feature, Campus Coach asks you what your current eating habits are during exercise. Based on your answer, you start at a level adapted to your level, ranging from 15 g of carbohydrates per hour up to 90 g/h for the most experienced runners.

The idea is not to change everything at once. You progress level by level, gently, to give your digestive system time to adapt.

nutrition screen choice habits consumption carbohydrates per hour

Recommendations for your long and intense workouts

Gut Training is activated on workouts where it’s relevant: long runs and intense workouts. Campus Coach recommends a carbohydrate intake adapted to the duration of your workout and your current step. On short efforts, your body has enough reserves and doesn’t need a large intake. On efforts lasting several hours, energy intake becomes essential.

Suggested recipes adapted to you

Campus Coach doesn't just tell you how many carbohydrates to consume, but also what to consume. The app suggests recipes and products adapted to your preferences: homemade or store-bought, in liquid, semi-liquid or solid form. So you can find what suits you best.

An adjustment based on how you feel

After each workout, you indicate how you felt: comfortable, low on energy, or with digestive discomfort. Campus Coach uses this feedback to adjust your recommendations. When you successfully validate several workouts at the same level, the app suggests moving to the next one.

It’s an intelligent and progressive system that really adapts to your personal tolerance.

No more ruined races

With Gut Training built into your Campus Coach plan, you no longer fear fueling or stomach aches. You arrive on race day with a stomach as prepared as your legs, and you give yourself every chance to perform until the finish line.

What is Gut Training?

Gut Training is the invisible training of runners.

It teaches your digestive system to tolerate the energy you consume during exercise.

It helps you push back the wall, maintain your pace, and finish strong.

It prepares you to perform on a half-marathon, marathon, long trail run, or ultra without digestive issues.

Campus now incorporates this method into your training plan:

Gradual steps to get your body used to it.
Workouts calibrated according to your distance and profile.
Post-workout feedback to finely adjust your energy strategy.

Result: stable energy, a ready body, and a race managed from start to finish.

Which workouts does Campus plan for gut training?

If you activate the Gut Training option, we’ll recommend a certain carbohydrate intake for your long runs and intense workouts. The more you train your stomach, the more you eliminate the risk of a “glitch” on race day!

How do you fuel for a half-marathon?

In a half-marathon, your goal is to keep your energy up from the first to the last kilometer without overloading your stomach. The ideal is to take in between 30 and 60 g of carbohydrates per hour through energy gels, race drinks or easy-to-digest bars.

The most important thing: test your fueling during training so your digestive system gets used to it.

This is exactly what Campus's Gut Training makes possible: integrating digestive training directly into your plan.

Thanks to gradual steps and adapted workouts, your stomach learns to tolerate running gels and manage marathon drinks during exercise.

Result: smooth half-marathon nutrition, controlled digestion, and energy that lasts until the finish line.

How much fueling for a marathon?

Marathon fueling is a strategy in its own right: over 42 km, carbohydrate and hydration management determines your performance.

Depending on the duration of your effort, the ideal would be to aim for around 60 to 90 g of carbohydrates per hour, alternating if you wish endurance gels, energy drink, or sometimes solid pieces (like fruit paste).

The most common mistake? Trying these products on race day.

With Campus's Gut Training, you learn to train your stomach like your legs.

Each week, your plan helps you test your running nutrition in real-life conditions, adjust your dosage, and strengthen your digestive tolerance.

That way, your marathon nutrition plan becomes more than just a carbohydrate calculation: it's real training for performance, without cramps or nausea.

How do you fuel for a trail race?

In trail running, the body faces efforts that are generally longer than on the road, more uneven, and often at altitude. The fueling challenge is twofold: preserve glycogen stores while avoiding digestive issues.

Depending on the duration, aim for 40 to 80 g of carbohydrates per hour in trail running, alternating running gels, isotonic drinks, and salty or solid foods (such as dried fruit or gingerbread).

Campus's Gut Training helps you prepare your body for this challenge: you'll find specific workouts to test your running gel, your hydration, and your energy intake on long runs.

By getting your digestive system used to exercise, you gain muscular endurance and comfort over long distances — for controlled trail fueling, even after several hours of effort.

Can you train after eating?

Gut Training can lead you to do certain runs after a big meal to train your digestive system to handle endurance effort while your stomach is full. With training and good progressiveness, you’ll get there more easily.

Half-marathon

Marathon

The Campus Trail

Gut Training: train your digestive system with Campus Coach

What exactly is Gut Training?

Why is it important for your race?

How does it work in Campus Coach?

A system of gradual steps

Recommendations for your long and intense workouts

Suggested recipes adapted to you

An adjustment based on how you feel

No more ruined races

Frequently asked questions

What is Gut Training?

Which workouts does Campus plan for gut training?

How do you fuel for a half-marathon?

How much fueling for a marathon?

How do you fuel for a trail race?

Can you train after eating?

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