FuelXC is the first sports nutrition intelligence platform that tells you, session by session, exactly how what you ate affected your performance — with evidence, not guesswork.
You have Strava watts, WHOOP recovery scores, and your nutrition logged — but zero understanding of how they connect. Why did you bonk at mile 18? Why was Tuesday's ride a breakthrough? The answer is in the data. You just can't see it yet.
Knows your watts, pace, power zones, HR drift, and training load. But has no idea what you ate two hours before.
Knows your HRV, sleep quality, and recovery score. Cannot connect your low recovery to the underfueled long ride two days ago.
The simplest nutrition log built for athletes. Snap a photo, speak a meal, or search — and FuelXC maps every gram of carbs to the session it fueled.
No platform connects these dots. No platform computes a Fueling Effectiveness Score. No platform tells you what to change next time.
FuelXC pulls your training, recovery, and nutrition data together — then does the analysis your coach wishes they had time for.
Link Strava, TrainingPeaks, and WHOOP in minutes. Then log your food directly in FuelXC — the fastest, most athlete-friendly nutrition log you've ever used. No app-switching required.
FuelXC converts your raw nutrition logs into sport-science primitives: carbs/hour, sodium/hour, fluids/hour, caffeine timing — then matches them to every session outcome.
FuelXC surfaces your Fueling Effectiveness Score, matched-session comparisons, and specific recommendations — accounting for confounders like heat, fatigue, and training load so the insights are actually defensible.
Everything your sports dietitian and coach wish they had — without the spreadsheet.
A single, explainable score (0–100) that answers: did this nutrition strategy improve your outcomes versus your personal baseline? Includes effect size, confidence level, and exactly why.
Visualize carb intake, fluid intake, and key power/HR metrics on a single timeline to see exactly when fueling aligned with — or diverged from — your performance.
Compare sessions with similar distance, intensity, and conditions but different fueling strategies. Isolate nutrition as the variable. See what actually works for you.
When evidence is weak, FuelXC designs a structured nutrition experiment for you. Define your hypothesis, track the protocol, and get statistically valid results from your own body.
Connects post-session nutrition timing (protein window, total carbs, energy availability) to HRV, resting HR, and sleep metrics — with confounders for training load and stress.
Weekly nutrition-performance summaries that coaches actually want to read. Athlete-specific strategy cards that evolve as evidence accumulates. No more generic advice.
Not "eat more carbs." Evidence-based, athlete-specific insights with confidence levels.
"Your best sustained power on long rides occurred when carb intake was 80–95g/h using mixed carb sources. Sessions below 65g/h correlated with a 9% drop in normalized power in the final hour."
"On hot sessions, fluids below 0.5 L/h correlated with higher cardiac drift (+14 bpm) and 18% slower recovery HRV the following morning. Increase to 0.7–0.9 L/h."
"Caffeine improved interval completion rate by 12% and reduced RPE by ~1pt, but sessions with caffeine after 2pm correlated with 22 min less deep sleep. Reserve for key sessions only."
FuelXC is currently in private beta. Join the waiting list and get early access when we open to endurance athletes.