Performance Fueling

Performance Fueling explores the fundamentals of endurance energy and nutrition. Here you’ll find practical explanations of how carbohydrates, energy gels, and fueling strategies support sustained performance during training and racing.

These articles are part of our broader Fueling Science resource, where we break down endurance fueling without unnecessary complexity.
Subtle countdown timer embossed into a neutral sandy background, symbolising timing during endurance running.
How Many Energy Gels Per Hour While Running?
A science-based guide to how many energy gels you actually need per hour, based on intensity, duration, gut absorption, and real-world performance evidence. Read more...
Caffeine Energy Gels: How Much Is Too Much?
Caffeine Energy Gels: How Much Is Too Much?
A science-based guide to how much caffeine endurance athletes actually need, how caffeine gels affect absorption, and where performance gains turn into side effects. Read more...
Natural carbohydrate foods commonly used for endurance fueling, including honey, rice, oats, dried fruit, and energy bites arranged on a wooden surface.
How to Fuel a Marathon With Natural Carbs
A practical, science-based guide to marathon fueling, explaining how much carbohydrate you need, when to fuel, and how to use natural sources to sustain race-day performance. Read more...