The Guaranteed Way to Prevent Hitting the Wall

More than just a fueling plan: CarbRate helps you plan, practice, and execute your optimal fueling strategy so you never have to worry about stomach issues or hitting the wall.
  • A fueling plan personalized to your sweat rate, gut tolerance, fitness level and goals
  • A week-by-week practice schedule built from your existing training plan to ensure your gut is ready
  • Built for your exact course, including adapting to hills and aid stations
  • Race-day guidance that adapts to the weather and tells you when to take every gel and drink, in your ear
  • And much, much more…
CarbRate course guide: your fuel placed on the real elevation profile, clear of the climbs, with every water station listed
CarbRate plan screen: 14 weeks to go, this week’s fueling practice and the race-day schedule
CarbRate practice plan: every run has a fueling job, week 9 of 16
CarbRate race-day schedule: every feed timed and placed on a real water station
CarbRate live race guidance: gel at the station in 0.4 miles
11 mins
Average improvement from runners who followed a structured fueling plan vs. those that fueled with a general plan
Hansen et al., Improved Marathon Performance by In-Race Nutritional Strategy Intervention
47%
Less gut and stomach issues during the race for those who implemented a weekly practice schedule in training
Costa/Miall gut-training trials, incl. Miall et al. 2018
54%
Better carbohydrate absorption for runners that adapted their fueling plan to race-day weather and their specific course
Knowing is not the problem

Marathoners using a specific fueling plan finished 11 minutes faster than those fueling by feel

A 2014 trial by Hansen studied 14 pairs of experienced marathoners, matched within 1% on a 10K time trial. One group followed a written schedule, the other fueled by feel.

The group fueling by feel averaged 38 grams of carbs an hour, finished in 3:49. The group with a schedule took in 65 grams an hour, finished in 3:38.

That’s an 11 minute improvement just by having a specific fueling schedule.

3:303:403:504:0011 MINUTESWRITTEN SCHEDULE65 G/HR3:38FUELING BY FEEL38 G/HR3:494.4% faster over 26.2 miles · Hansen et al. 2014, 14 matched pairs

We built CarbRate to give you that plan…and more

CarbRate not only gives you an individualized race nutrition plan based on science, but tells you exactly how much and when to take while on the course and helps you train your gut, practice correctly and adjust your plan for race-day conditions.

Built for your exact course

A fueling plan drawn on your actual course

Tired of a fueling plan that tells you to take a gel at 40 minutes, when 40 minutes puts you halfway up a hill with no water in sight?

CarbRate places every gel and every drink on the real course you are running, using its actual elevation profile and the aid stations the race publishes.

So each feed lands somewhere you can actually swallow it: on a runnable grade, with water in your hand.

In our worked Boston example, a 3:30 goal at 18°C, all eleven feeds land on a real aid station, and not one lands on a climb steeper than 3%.
The race-day schedule: every step tied to a numbered water stationThe Boston course guide, with your fuel drawn on the elevation profile
Personalized to your body and goal

Built from your own numbers and preferences

Tired of fueling advice that hands you the same gel every 30 minutes it hands a runner 40 pounds lighter and an hour faster?

CarbRate builds your plan from your weight, your goal time, your measured sweat rate, what your stomach handles today, and the weather you will be running in.

Twelve questions, about four minutes, and every one of them has an answer for people who are not sure.

Two runners chasing the same 3:30 marathon in the same 22°C race sweat 1.0 and 2.4 litres an hour. One plan cannot serve both.
The weight question, and what it does to your burn ratePlan home showing a measured sweat rate and the salt that follows from it
Ready for race-day weather

A fueling plan that changes when the forecast does

Tired of building a fueling plan in February and running a race that turns out twenty degrees warmer than the day you planned for?

From ten days out, CarbRate reads your race-day forecast and shows you exactly what a warmer or cooler morning does to your sweat rate, your fluid, your sodium and your finish time.

One tap updates the plan. Nothing changes behind your back.

Across 1.79 million marathon performances, a mid-pack runner loses about 4% at ten degrees above their best temperature and nearly 18% at twenty.
Race week: the forecast firmed up and a new plan version is readyPlan home: a warmer forecast has moved the drink budget, with an undo
Live guidance through every gel and drink

CarbRate tells you exactly when to fuel during the race

Tired of doing arithmetic at mile 18 to work out whether you are behind on your gels?

On race day CarbRate counts down to every feed, tells you exactly what to take and where, and says it out loud over your music.

Nothing to memorize, nothing to check, and no math while you are running.

Runners handed a structured fueling schedule finished a marathon 10:55 faster than runners matched to them on fitness who fueled by feel, taking in 64.7 g/hr against 38.0.
Race morning: the app becomes the start buttonThe live cue: gel at the station, four tenths of a mile out
Train your gut to handle more fuel

A training plan for your stomach

Tired of races ruined by stomach trouble or hitting the wall even though you took your gels?

CarbRate creates a week-by-week fueling practice schedule based on your fueling plan, scheduled workouts and long runs, and your current stomach tolerances.

Each week tells you which run to practice on, what to take, and how and what to adjust to make your gut and fueling plan stronger.

In a 2023 review of gut-training studies, 2 weeks of fueling practice raised carb absorption by 45 to 54% and cut gut symptoms by 26 to 47%.
The dress rehearsal checklistCarbRate Practice tab: week 9 of 16, Sunday hard long run carrying the exact race strategy
Use the products you already like

Your plan, built from the fuel you already train with

Tired of a fueling plan that says take a gel, when the gel in your pocket has 40 grams of carbohydrate and the one it was written for has 22?

CarbRate is built on 163 gels, chews, drink mixes, bars, real food and electrolytes, every one of them checked against its own label.

Pick what you actually carry and the whole plan re-counts itself around it: how many, at what times, and how much of your carbohydrate is already in your bottle.

163 products from 76 brands, with a source link stored for every nutrition field and the verification state shown on every one.
The catalog, with a score and a reason on every productPick the gel and the drink you actually carry