# Fueling for Hyrox: What the Science Says About Carbs and Protein
Hyrox, the 8-kilometer obstacle course race gaining popularity worldwide, demands a specific nutritional approach. Unlike traditional running or CrossFit, Hyrox combines endurance with functional movement stations, requiring athletes to blend aerobic capacity with muscular strength and stamina.
The carb versus protein debate loses relevance for Hyrox athletes. Both nutrients work together rather than against each other. Sports nutritionists recommend a fueling strategy that prioritizes carbohydrate availability for energy during the race while maintaining adequate protein for muscle repair and strength maintenance.
For competition day, athletes benefit from consuming 1 to 4 grams of carbohydrate per kilogram of body weight in the 1 to 4 hours before racing, depending on individual tolerance and race start time. This fueling window ensures glycogen stores remain topped off without causing gastrointestinal distress. A 70-kilogram athlete might consume 70 to 280 grams of carbs based on timing and digestion capacity.
Protein serves a different purpose in pre-race nutrition. Rather than fueling the race itself, protein consumed in the 24 hours before competition supports muscle integrity and recovery readiness. The International Society of Sports Nutrition recommends 1.6 to 2.2 grams of protein per kilogram of body weight daily for athletes undergoing intense training.
During the race, hydration with carbohydrate-electrolyte solutions becomes critical. The eight-kilometer distance with multiple movement stations prevents many athletes from consuming solid food mid-race. Sports drinks delivering 30 to 60 grams of carbohydrate per hour maintain blood glucose and delay fatigue.
Post-race, the combination matters most. Consuming 1