Race Nutrition Guide: Fuel Your Run Right

Proper nutrition is a critical component of race-day performance for runners, with carbohydrate intake and hydration strategies playing central roles in sustaining energy and preventing fatigue. According to Canadian Running Magazine’s race nutrition review, long-distance runners should prioritize carbohydrates as their primary fuel source, aiming to consume 30 to 60 grams per hour during runs lasting longer than 75 minutes to maintain glycogen stores and delay the onset of fatigue.

The review emphasizes that the body’s glycogen reserves are limited, typically supporting only 90 to 120 minutes of high-intensity running before depletion occurs without supplemental fuel. To counteract this, runners are advised to begin fueling early in a race or long training session, using easily digestible carbohydrate sources such as energy gels, chews, or sports drinks that provide a steady supply of glucose to working muscles.

Hydration is equally important, though the guidance cautions against overdrinking, which can lead to hyponatremia—a potentially dangerous condition caused by diluted sodium levels in the blood. Instead, runners should aim to replace a portion of sweat losses, adjusting intake based on individual sweat rate, environmental conditions and duration of activity. Sodium supplementation is particularly recommended for heavy sweaters or those competing in hot climates to maintain electrolyte balance and support proper muscle function.

Products frequently cited in runner nutrition discussions include Clif Bloks, Huma energy gels, Skratch Labs hydration mixes, SaltStick electrolyte capsules, Wakewater, and Xact energy chews—each designed to deliver carbohydrates, electrolytes, or both in formats suited for consumption during exercise. The review notes that choosing products with minimal added fiber, fat, or protein can help reduce gastrointestinal distress, a common issue when fueling during intense activity.

Beyond race day, daily nutrition forms the foundation for effective training, and recovery. General recommendations for runners include consuming 5 to 7 grams of carbohydrates per kilogram of body weight per day during moderate training, increasing to 7 to 10 grams per kilogram during heavy training blocks. Protein intake should range from 1.4 to 1.8 grams per kilogram daily, distributed across three to five meals, with 20 to 35 grams consumed within one to two hours after key workouts to support muscle repair.

Whole food sources such as whole grains, fruits, potatoes, and rice are encouraged as primary carbohydrate sources, while lean proteins, legumes, and dairy contribute to overall nutrient needs. The review stresses that while perfection is not required, consistency in eating patterns that match training load supports long-term health, adaptation, and performance gains.

the most effective fueling strategy is one that is personalized and practiced during training. Runners are encouraged to test different products, timing, and quantities under realistic conditions to determine what works best for their gut, pace, and goals—turning nutrition into a reliable advantage on race day.