Lifestyle, Functional Training News, Athletic Preparation HYROX Guide: Nutrition and Physiology of Hybrid Performance by Sidea Published on March 20, 2026 by Michael Maraldi

From Amateur to Elite: Strategies in Bioenergetics, Nutrition, and Applied Physiology

In the contemporary landscape of athletic training, disciplines like HYROX are much more than mere sporting competitions: they are the expression of a new training culture, where endurance, strength, and body awareness converge in a complex and deeply personal challenge. Preparing for these events doesn’t just mean accumulating kilometers or lifting weights, but understanding the physiological mechanisms that govern performance and learning to communicate with your own body.

In this context, SIDEA is committed to supporting athletes not only through the design and distribution of high-level technical equipment—now among the most highly regarded in the European physical preparation scene—but also by promoting a training culture founded on knowledge. Because the quality of the tools is important, but it only becomes truly meaningful when accompanied by a deep understanding of the processes that drive adaptation and performance.

For this reason, SIDEA engages and collaborates with professionals in sports research and practice—nutritionists, trainers, and exercise physiologists—with the goal of offering athletes not only reliable equipment but also tools for awareness. Advice, insights, and scientific contributions that can help those who train to face the challenges these competitions impose with greater clarity.

The article that follows is born from this spirit: to connect field experience with the knowledge of physiology and sports nutrition, so that every athlete can face their race not only with strength and determination, but also with that understanding of the body that transforms fatigue into progress and performance into experience.

The Hierarchy of Substrates: Glycogen as the Primary Currency

In biochemistry, every effort is dictated by the availability of ATP. During a HYROX race, the average intensity is consistently at or above the anaerobic threshold (85-90% of Max Heart Rate). In this state, the body favors the glycolytic pathway: muscle glycogen becomes the primary energy currency.

The Carb-Loading Protocol:

According to ISSN guidelines (Kerksick et al., 2018), saturating glycogen stores can improve high-intensity endurance performance by 15-20%.

• Target: 7-10g of carbohydrates per kg of body mass in the 48-72 hours prior to the event.
• Source Selection: It is crucial to reduce fibrous residue. Sources like basmati rice, durum wheat pasta, and peeled potatoes minimize fecal volume and the risk of gastrointestinal distress during the running portions—a problem that affects up to 50% of athletes under competitive stress.

Practical Examples: The Pre- and Intra-Race Meal

If the competition takes place in the morning, breakfast must ensure glycemic stability and rapid gastric emptying. An excess of fats and fiber is not recommended, as they would slow digestion and divert oxygenated blood from the muscles.

Example A: “Sweet” Breakfast (3-4 hours before the Start)

• Base: 80-100g of instant oatmeal (more digestible than whole oats) cooked in water or rice milk.
• Sugars: 1 ripe sliced banana and 1 tablespoon of honey or maple syrup.
• Protein: 150g of cooked egg whites or 25g of whey protein isolate.
• Hydration: 500ml of water with a pinch of sea salt.

Example B: “Savory” Breakfast (Ideal for insulin stability)

• Base: 100-120g of well-cooked basmati rice (facilitates the hydrolysis of starches).
• Topping: A drizzle of raw extra virgin olive oil.
• Protein: 80g of high-quality bresaola or turkey breast (low in fat).

If your starting heat is scheduled for the afternoon, lunch becomes your true “final load.” It should be consumed about 3-4 hours before the start to ensure your stomach is empty, but your liver and muscle glycogen stores are at their peak.

• Base (Carbohydrates): 100-130g of basmati rice or white pasta (avoid whole grains due to fiber content). Basmati rice is preferable for its moderate glycemic index, which ensures a steady release of energy.
• Protein (Digestibility): 100g of grilled chicken breast or steamed cod. Avoid red or fatty meats, which require longer digestion times (up to 5-6 hours).
• Fats: Limit to 1 tablespoon of raw extra virgin olive oil. Fats slow down gastric emptying, a risk we don’t want to take under exertion.
• Vegetables: At this stage, zero vegetables. Even as nutritionists, we know that fiber during a race can cause fermentation and intestinal discomfort while running.
• Hydration: 400-500ml of still water, avoiding carbonated drinks that could cause abdominal bloating.

The “Connector” Snack (60-90 minutes before the Start)

For those competing in the late afternoon, too much time may pass between lunch and the race. In this case, to avoid blood sugar drops (reactive hypoglycemia):

• What: 1 very ripe banana or 2-3 dates, or a slice of white bread with a thin layer of jam.
• Why: It provides the small boost of simple sugars needed to tackle the warm-up and the first kilometers of the race with maximum mental clarity.

The Intra-Workout Protocol

• T-45 min: 250ml of water with 15g of cyclodextrins.
• Station 4 (Sled Pull) / Run 5: First gel (25-30g carbohydrates, 2:1 Maltodextrin/Fructose ratio).
• Station 6 (Rowing) / Run 7: Second gel to maintain high Central Nervous System clarity before the final Wall Balls.

Intra-Race Strategy: Real-Time Fueling Management

HYROX is a dynamic race. Supplementation must be precise, especially in the transitions between running and strength stations.

The Intra-Workout Protocol (Practical Example)

Let’s imagine an athlete with a 2:00 PM start time:

• T-45 min (Warm-up): 250ml of water with 15g of cyclodextrins (carbohydrates with a high rate of gastric emptying).
• Run 4 (Post-Sled Pull): First gel (25-30g of carbohydrates, 2:1 Maltodextrin/Fructose ratio). The Sled Push/Pull has a huge glycolytic cost; refueling here is vital.
• Run 6 (Post-Rowing): Second gel. The rower engages large muscle groups; a glucose boost is needed for the Central Nervous System before the Sandbag Lunges.
• Hydration: Take advantage of every aid station for small sips (100ml) of an isotonic solution.

Elite vs. Amateur: Two Engines, Two Approaches

• The Elite Athlete (Target < 65 min): The race is a prolonged sprint. Supplementation must be almost exclusively liquid or in hydrated gels. The intensity is such that chewing a bar would be impossible due to the high respiratory rate.
• The Amateur Athlete (Target > 90 min): The limiting factor is duration. The amateur must manage hydration (electrolytes) more effectively, as the prolonged sweat rate increases the risk of imbalances that lead to cramps and a drop in neuromuscular power.

Female Physiology: Hormones and Hybrid Performance

When it comes to sports, women require specific programming. The menstrual cycle impacts thermoregulation and substrate use.

• Follicular Phase: High insulin sensitivity; the athlete is more efficient at using carbohydrates.
• Luteal Phase: Increase in body temperature and progesterone. As highlighted by Sims et al. (2023), in this phase, women are more susceptible to hyponatremia. It is crucial to increase intra-race sodium intake (by approximately +20%) to maintain plasma volume.

Evidence-Based Supplementation

Based on the official positions of the ISSN (Guest et al., 2021):

1. Beta-Alanine: 4-6g/day (chronic intake) to increase muscle carnosine and buffer lactic acidosis.
2. Caffeine: 3-6mg/kg approximately 60 minutes before the start. It improves explosive strength and aerobic endurance.
3. Citrulline Malate: 6-8g to promote vasodilation and the clearance of ammonia produced during resistance-strength efforts.

Conclusions: More Than a Race, a Journey Towards Oneself

Ultimately, HYROX is not just a brutal sequence of running and strength stations. It is an honest confrontation with one’s own resilience. Each of us enters the field with a different goal: the podium for the elite athlete, overcoming a personal limit for the amateur, or simply the desire to feel alive and strong. The purpose of shrewd physical and nutritional preparation is to ensure that your body is a match for your dreams. The science of nutrition provides us with the bricks and the training provides the structure, but it is your spirit that guides the machine across the finish line. Remember: every gel taken at the right moment, every gram of carbohydrate loaded in the preceding days, and every sip of salts are not just technical gestures. They are acts of care for yourself, promises you make to your body to allow it to shine when fatigue makes itself felt. You don’t just run with your legs; you run with the awareness that you have given your cells everything they need to make you proud of yourself.

The Speaker: Cristian Barone

“My name is Cristian Barone, and my mission is to translate the complexity of biochemistry into concrete results on the field. I am a Biologist Nutritionist and personal trainer with a Master’s degree in Nutritional Sciences, registered with the professional board, and I also hold a Master’s in Human Nutrition and a master’s in sports nutrition.

In my daily practice, I don’t just draw up meal plans or training schedules: I integrate these two worlds to build the athlete from a 360-degree perspective. I firmly believe that performance, whether elite or amateur, is born from the perfect balance between the science of nutrients and the logic of movement. My goal is to provide every athlete, from the amateur to the professional, with the biochemical and physical tools to overcome their limits.”

Dr. Cristian Barone