Fueling Your Engine: Hyrox Race Day Nutrition

The Formula for Failure

You are 45 minutes into a Hyrox race.You have finished the sleds and the burpees.You pick up the farmers walk handles—and the lights go out.Your legs are heavy, your vision blurs, and you just want to quit.

You just "bonked." In 2026, we avoid this by treating nutrition as a performance factor, not an afterthought.

1. The Carbo - Loading Window(48 Hours Out)

Your muscles store energy as glycogen.You cannot "fill the tank" on the morning of the race.

• The Protocol: Increase your carb intake to 7 - 10g per kg of bodyweight starting 2 days before the race wave.
• The Sources: Stick to familiar, low - fiber options.White rice, potatoes, pancakes, and pasta.Avoid high - fiber beans or cruciferous vegetables that can cause "Hyrox Belly"(bloating) on the course.

2. The Pre - Race Topping(3 Hours Out)

This meal is for blood sugar stability and liver glycogen.

• The Ideal Meal: 1.5g of carbs per kg of bodyweight.Something like a bagel with honey / jam and a small amount of lean protein(turkey or egg whites).
• The Caffeine Spike: Take 3 - 6mg of caffeine per kg of bodyweight 60 minutes before the start.Caffeine is the most proven ergonomic aid for endurance and focus.

3. Intra - Race Strategies: Do You Need Gels ?

A 70 - 90 minute Hyrox is on the edge of needing intra - race fueling.

• Sub - 65 Minute Athletes: You likely have enough storage to finish without fuel.Focus on water and electrolytes at the aid stations.
• 90 + Minute Athletes: You must fuel.Take one high - quality carbohydrate gel(e.g., Maurten or Precision) around the 40 - minute mark(typically after the Sled Pull or Rower).This will give you the glucose "kick" needed for the final, grueling Wall Balls.

4. Hydration: The Sweat Test

Hyrox venues are indoors, hot, and often lack airflow.You will sweat more than you realize.

• The Electrolyte Rule: Do not just drink plain water.You are losing sodium, potassium, and magnesium.Ensure your pre - race water is "salty" with an electrolyte mix.
• The Station Rule: Sip at every station.Even 3 - 4 ounces keeps the mouth from drying and the heart rate from spiking due to dehydration.

How RepLog Optimizes Your Fueling

RepLog's Nutrition Integration syncs with your race training block.

• Glycogen Depletion Estimator: Based on your heart rate data during training, the app estimates how many calories you are burning per station.
• Fueling Prompts: In the "Race Prep" module, the app provides a personalized countdown of what to eat and when, based on your specific start time.

Summary

Don't let a "hunger flat" ruin six months of training. Load your carbs early, hydrate with electrolytes, and time your caffeine perfectly.

Fuel the engine.Finish the race.