HYROX is the fastest-growing fitness sport in the world. Created in 2017 in Hamburg, Germany, the format is identical in every country: 8 km of running divided into 8 segments of 1 km, each followed by a functional exercise station. Because the course and stations are standardized, it allows for the comparison of results between athletes anywhere on the planet.

A tough race lasting just under an hour for elite athletes, and up to 1.5 to 2 hours for most participants. Energy expenditure typically ranges between 800 and 1,500 kcal, depending on body weight, category, and intensity. It may seem like less than a marathon, but the combination of running with high-intensity strength efforts makes HYROX one of the most metabolically demanding races.

HYROX consists of eight stations, always in the same order, each preceded by a 1 km run.
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The race begins with the SkiErg, where the athlete covers 1,000 m on an ergometer that simulates the motion of cross-country skiing. The primary demand is upper body and core endurance.
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Next comes the Sled Push, where the athlete pushes a weighted sled for 50 m. This is a leg strength station. Immediately after, in the Sled Pull, they pull the sled for the same 50 m, which requires back and arm strength.
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The fourth station is the Burpee Broad Jump: 80 m of burpees combined with broad jumps, a test of power and endurance. Then comes the rowing ergometer, with 1,000 m that work full-body endurance.
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In the Farmers Carry, the athlete carries two weights, one in each hand, for 200 m, which requires grip strength and stability.
Following that, the Sandbag Lunges consist of 100 meters of lunges with a sandbag on your shoulders. This station tests leg strength while already under significant fatigue.
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The race ends with Wall Balls: 100 squat repetitions followed by throwing a medicine ball against a wall target. These require muscular endurance and coordination.

The weights vary according to the category (Open, Pro, Doubles, and Relay) and the athlete's gender.

In this scenario, nutrition is far from a minor detail. A well-planned dietary strategy ensures energy for running and lifting, helps manage fatigue, prevents dehydration, and accelerates recovery. Conversely, nutritional mistakes can turn the final stations, especially the lunges and wall balls, into a true nightmare.

Understanding what to eat before, during, and after the race, and how supplementation can support this process, is essential to reaching the final wall ball with strength and crossing the finish line with a strong performance.
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Why is nutrition so decisive in HYROX?

HYROX is a hybrid sport: it alternates continuous aerobic effort, through running, with strength and power efforts at the stations. This requires different energy systems to work simultaneously and recover in a very short time.

The primary fuel for the race is carbohydrates, stored as glycogen in the muscles and liver. During high-intensity efforts, such as pushing the sled or performing wall balls, muscle glycogen is consumed at an accelerated rate. With low stores, the athlete loses strength, running pace drops, and fatigue sets in sooner.

Furthermore, the most intense stations increase the production of hydrogen ions, which acidify the muscle environment and contribute to that "burning" sensation and loss of power. Add to this the intense sweating in warm, indoor environments, and the loss of water and electrolytes accumulates rapidly.

Among the main nutritional challenges of the race are:

• arriving at the start line with full glycogen stores;

• maintaining strength and power even after several kilometers of running;

• managing muscle fatigue caused by acidosis;

• replenishing fluids and electrolytes in a balanced way;

• promoting muscle recovery after the effort.
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Before the race: the strategy begins the day before
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Carbohydrate loading

Since HYROX lasts between 1 and 2 hours, you don't need as extensive a carbohydrate load as you would for ultra-endurance events. Even so, arriving with your glycogen stores topped off makes a difference, especially during the final stations.

For events lasting up to 90 minutes, it is recommended to consume about 7 to 12 g of carbohydrates per kg of body weight in the 24 hours prior, combined with a reduction in training volume and intensity. Athletes expecting to exceed 90 minutes may benefit from maintaining this range for 36 to 48 hours.

During this period, prioritize easily digestible foods such as rice, pasta, potatoes, bread, tapioca, and fruit, while reducing excess fiber and fat, which can cause discomfort during the race.
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The pre-race meal

The final meal should be eaten 2 to 4 hours before the start, consisting of about 1 to 4 g of carbohydrates per kg of body weight, low fat, low fiber, and a moderate amount of protein. Since HYROX heats are scheduled, often in the middle of the day, it is important to plan this meal according to your start time.

Options like bread with honey or jam, bananas, tapioca, oatmeal, or a moderate portion of rice with chicken are usually well tolerated.

Hydration should also be on point: drinking between 5 and 7 ml of fluid per kg of body weight about 4 hours before helps the body start the race in a state of fluid balance.

The golden rule: no surprises on race day. All foods, drinks, and supplements should have been tested previously during training and simulations.
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During the race: fueling between the run and the stations
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Running

The 1 km segments are the time to control your pace and catch your breath between stations. Starting too fast is a common mistake: the athlete burns through glycogen and accumulates fatigue right at the beginning, paying the price in the final stations.
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Strength stations

You cannot eat during the stations. The sled push, sled pull, and wall balls rely on the energy already available in the muscle, which is why your previous nutritional strategy and intake during the intervals are so important.
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Roxzone: the time to refuel

The Roxzone is the transition area between the run and the stations, and it usually has hydration points. It is the most practical time for small sips of water or sports drinks and, if necessary, a carbohydrate gel.

For races lasting up to 1 hour, carbohydrate intake during the effort has a minor effect; some athletes simply rinse their mouths with a sports drink, a strategy that can reduce the perception of effort. For those who will be racing for between 1 and 2 hours, recommendations suggest 30 to 60 g of carbohydrates per hour.

In practice, this usually means:

• one carbohydrate gel around the halfway point of the race, for example after the 4th station;

• a second gel before the final stations, for those who take longer than 1 hour and 30 minutes;

• small sips of sports drink at the hydration points.
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Hydration and electrolytes

HYROX events generally take place indoors, in crowded environments with high temperatures, which increases sweat rates. As a general guideline, intake is usually between 400 and 800 ml per hour, ideally adjusted based on sweat rate tests conducted during training.

Sodium replacement deserves attention, especially for athletes who sweat heavily or notice salt marks on their clothing. However, the goal is not to drink as much as possible: excess fluid weighs down the stomach and hinders performance during burpees and running. The goal is to drink just enough.
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Gut training is part of your training

In HYROX, the stomach is challenged by movements that compress the abdomen, such as burpees, lunges, and wall ball squats. This is why testing your nutritional strategy during training sessions is even more critical.

Just like your muscles and heart, your digestive system adapts to stimulus. Practicing your planned intake increases tolerance and reduces symptoms such as nausea, reflux, cramping, and bloating.

In practice, this means using mock race simulations to test your pre-race meal timing, the type of gel or drink you use, and the exact moment of intake within the Roxzone.
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Post-race: prioritizing recovery

Upon crossing the finish line, your body is glycogen-depleted, dehydrated, and has micro-tears in the muscles—especially in the legs, which were heavily taxed by running, sled pushes/pulls, lunges, and wall balls. Nutritional recovery should begin as soon as possible and is based on three pillars:

Carbohydrate replenishment: consuming about 1 to 1.2 g of carbohydrates per kg of body weight per hour during the first few hours helps restore glycogen, especially for those competing in more than one category over the same weekend.

Protein: intaking 20 to 40 g of high-quality protein (about 0.3 g per kg) promotes muscle repair and synthesis. In HYROX, this pillar carries extra weight due to the significant strength component of the event.

Rehydration: replenish fluids and electrolytes gradually, with about 1.25 to 1.5 liters for every kilogram of body weight lost during the race.

In the following days, a varied diet rich in fruits, vegetables, whole grains, proteins, and healthy fats helps modulate inflammation and delayed onset muscle soreness.

Supplementation: an ally in your nutritional strategy

When based on an individualized assessment, supplementation can make it easier to meet your nutritional goals and contribute to performance and recovery in HYROX. As it is a sport that combines strength and endurance, some strategies with strong scientific backing stand out:

Creatine: increases phosphocreatine stores, a source of rapid energy for strength and power efforts, such as the sled push and burpees. It also supports strength gains throughout your training cycle. The standard dose is 3 to 5 g per day, taken consistently.

Caffeine: can reduce the perception of effort and improve performance in both running and the stations. Doses of 3 to 6 mg per kg, taken about 60 minutes before the start, are the most studied.

Beta-alanine: increases muscle carnosine, which helps buffer acidity during intense efforts lasting 1 to 4 minutes, the profile of several stations. It requires daily use for at least 4 weeks and may cause temporary skin tingling.

Sodium bicarbonate: also helps control acidosis, but carries a higher risk of gastrointestinal discomfort. It should be tested very carefully during training, never for the first time on race day.

Carbohydrate gels or powders: practical to use in the Roxzone, they help maintain energy levels during longer races.

Electrolytes: capsules, tablets, or drinks containing sodium, potassium, and magnesium assist with fluid balance and muscle function.

Proteins: Whey protein and other convenient protein sources facilitate post-race muscle recovery and help meet daily protein goals.

Furthermore, nutritional formulations designed to provide antioxidants and other nutrients can be incorporated into personalized protocols throughout the training cycle, always respecting the athlete's individuality, lab results, and goals.

It is important to highlight that supplementation does not replace a well-structured diet, and its use should be guided by a nutritionist or physician.
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Warning signs during the race

Some symptoms indicate that the body may be exceeding its limits:

• dizziness, blurred vision, or mental confusion;

• persistent nausea and vomiting;

• chest pain or shortness of breath disproportionate to the effort;

• intense headache;

• severe and generalized cramps;

• very hot skin, or lack of sweat despite the heat.

In the presence of these signs, the safest course of action is to slow down or stop the race and seek the event's medical team. Dehydration, heat exhaustion, and excessive high-intensity exertion are serious conditions and should not be ignored.
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Conclusion

In HYROX, nutrition is just as strategic as running and strength training. Arriving at the start line with full energy stores, fueling intelligently in the Roxzone, staying hydrated, and prioritizing recovery immediately after finishing are fundamental steps for an athlete's performance and health.

With an individualized plan, tested during simulations and supported by evidence-based supplementation, athletes increase their chances of maintaining strength until the final wall ball. After all, in HYROX, those who fuel well run stronger and go further.

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