Triathlon isn’t just a race—it’s a test of endurance, strength, and smart fueling. Whether you’re training for your first sprint triathlon or pushing for an Ironman PR, nutrition is the fourth discipline that can make or break your performance. At Fuelin.com, we provide science-backed, personalized nutrition plans to keep you strong through every swim, bike, and run.
Instantly unlock custom nutrition coaching to power your goals
Simple.
"Less guesswork, smarter fueling, faster recovery—more time to train!"
- Nathalia C. (Endurance Runner)
Personalized.
"Nutrition made easy—it’s personalized to my goals, workouts, and lifestyle.”
- Mike Quinn (Recreational Triathlete)
Adaptive.
“I love how Fuelin adjusts to my workouts — a personal nutrition coach in my pocket.”
- Jack Thompson (Ultra Endurance Cyclist.)
Fuel Your Purpose in
1-2-3
Seamlessly integrate your training plan.
Learn how to fuel just right.
Fuel Smarter. Train Harder. Race Stronger.
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Fuel Your Purpose in 1-2-3
Sync your training, we handle the rest.
Learn how to fuel just right.
Fuel Smarter. Train Harder. Race Stronger.
Built by Experts. Driven by Science.
Scott Tindal
Accredited nutrition coach to professional triathletes and executives. Over 20 years experience in professional sports.
Dr. Alan McCubbin
Accredited Sports Dietitian and researcher with 20 years of experience working with endurance and ultra-endurance athletes.
Megan Foley
Registered Dietitian to endurance athletes at all levels, including professionals, Olympians, and age groupers.
Whatever your purpose, we tell you how to fuel.
Fuelin Works
Here’s The Proof
Our Community
“Before finding Fuelin I wasn't aware that a system existed that could accurately account for my training on a day to day basis based on the training my coaches set for me. It just takes the guesswork out of the whole process and has empowered me to properly fuel my body. I've felt increased energy, better recovery and more consistency. Also, practicing my race nutrition in training has led to greater confidence in my plan and becomes more second nature so that I can make sure l hit it in a race.”
"Fuelin has been a key factor on my training for Ultra Distance Triathlons. Fuelin has helped me complete my trainings and races feeling strong all the way through and recover faster, making my training more efficient."
"I feel lucky that we live in the age of information. However knowing what information is valuable is key. I am in safe hands with Fuelin and the team of experts in the field of nutrition for me to perform at my best."
"Fuelin has helped me nail my nutrition, not only for my sport, but for my overall health. This app is a game-changer for endurance athletes!"
"As an original partner of Fuelin since its inception, I’ve witnessed its tremendous impact on athletes at every level—from Purple Patch pros to individuals striving for better energy, health, and performance. It’s an integral part of Purple Patch programming.”
"Long story short, I went to the line at Ironman Indian Wells 70.3, healthy, feeling fresh, and at an ideal race weight, and I finished with my fastest closing mile, a PR, and a top ten AG place."
“Fuelin has been a game-changer in optimizing my athletes’ nutrition, helping them perform at their peak when it matters most.”
"It’s easy it’s simple and it’s super effective. It makes my coaching and my own athletic performance so much better."
"I really love Fuelin! Not just for the nutrition guidance on the app but also for the amazing education I have gained."
Got Questions?
We’ve Got Answers
Calorie trackers like MyFitnessPal record what you ate. Fuelin tells you what, when and how much to eat. It sets daily calorie, carb, protein and fat targets from your planned and completed workouts, gives you fueling guidance for training and race day, and adjusts your upcoming meals to what you've already eaten. If you already log food in MyFitnessPal, it syncs to Fuelin through Apple Health.
Fuelin starts with your goal, body weight, gender, athlete experience level and daily activity level. It then adds your planned and completed workouts, your resting metabolic rate (RMR) and performance markers such as functional threshold power (FTP) and threshold pace. Fuelin estimates your RMR, FTP and threshold pace, or you can enter your own values if you have them. Its recommendations are built by sports dietitians and based on the latest sports science.
Yes. Fuelin imports your completed workouts from Garmin Connect and Strava, so your nutrition targets reflect the training you actually did. You can connect one or both.
Fuelin syncs with TrainingPeaks, Garmin Connect, Strava, TriDot, RunDot, Final Surge, V.O2, HumanGO and Pushing Limits. Your planned workouts set your nutrition targets ahead of each session, and your targets update automatically when your training changes.
Yes. You can add your workouts directly in Fuelin, and it sets your daily nutrition targets from them the same way it does for synced training.
Elite Athletes Trust Fuelin—Now Available for Every Triathlete
When the world's best triathletes need to perform at the highest level, they trust Fuelin with their nutrition. From IRONMAN World Champions to professional triathletes competing on the global stage, elite athletes rely on our science-backed approach to fuel their success.
