The Origin of Pace & Fuel
Endurance training apps frequently focus exclusively on weekly mileage, paces, and heart rate zones while treating nutrition as an afterthought. Runners spend months dedicating 50–70 miles per week to marathon blocks, only to hit the wall at mile 19 because their gut rejected sudden high-concentration sugar doses or failed to take in adequate sodium.
At the other extreme, ultramarathoners tackle multi-hour continuous formats—like Backyard Ultras—without a structured camp turnaround protocol, succumbing to flavor fatigue or cold muscle stiffness in the chair.
Pace & Fuel bridges the divide between exercise science and practical race execution. We build tools that calculate exact intake values for your body mass, weather, and distance, paired with actionable gear carrying strategies.
How We Fund This Project
Pace & Fuel is an independently supported endurance resource. To keep every calculator, training schedule, and race guide free for athletes worldwide, we participate in affiliate marketing programs, including the Amazon Services LLC Associates Program and the Awin Publisher Network.
When you click a link on our site to purchase equipment (such as hydration vests, storage bottoms, toe socks, or nutrition items), we may receive a small referral commission directly from the retailer at zero additional expense to you.
We only recommend equipment, ingredients, and formulations that solve genuine mechanical or nutritional problems on race day.
Editorial & Health Integrity
The materials published across Pace & Fuel are compiled from peer-reviewed sports nutrition literature, real-world endurance testing, and official race logistics guides. However, sports nutrition is highly personalized.
Our calculators and schedules represent performance models, not personalized medical prescriptions. Athletes should always test fueling strategies progressively during long training runs and consult a healthcare professional before initiating high-demand training blocks.