Train the Plan: Why Your Race-Day Nutrition Strategy Starts Months Before the Start Line

There’s an old rule in endurance sport that gets thrown around so often it’s practically a cliché: never do anything on race day that you haven’t done in training.

It’s a cliché because it’s true. And nowhere does it matter more than with nutrition.

You can train your legs for months, nail your taper, recce the course, dial in your gear — and still have your race fall apart at 60km because you grabbed an unfamiliar gel at an aid station and your stomach decided it was done for the day. I’ve been there. It’s not fun.

Race-day nutrition isn’t something you figure out on race day. It’s something you build, test, break, fix, and refine across months of training. The race is just the final exam. And if you’ve done the homework, you walk in confident.

The Feedback Loop

The best race-day nutrition plans aren’t designed once and executed blindly. They’re the product of a feedback loop that runs through your entire training block:

Research and plan — pick your products, calculate your targets, map out your timing
Test in training — run your long runs with race-day nutrition, at race-day intensity
Observe what happens — what sat well, what didn’t, when did energy dip, when did your gut protest
Adjust — swap products, change timing, tweak quantities
Repeat — keep testing until you have a plan that works consistently

This isn’t a one-and-done process. It’s iterative. Every long run is a data point. Every bad stomach is a lesson. Every gel that sits perfectly at 30km but makes you queasy at 50km is information you need before race day, not during it.

Learning the Hard Way in the Blue Mountains

I learned this lesson the painful way during a training block for a Blue Mountains race. I’d been using a particular gel brand that I liked — good flavour, easy to open, sat fine on shorter runs. So I decided to try their high-caffeine version for my big 40km training day on the trails around Katoomba.

Terrible idea.

By 25km I was nauseous, jittery, and had that wired-but-exhausted feeling that anyone who’s overdone caffeine on an empty stomach knows too well. My heart rate was elevated beyond what the effort should have produced. I spent the last 15km walking, sipping water, and seriously questioning my life choices on a section of trail I’d normally run comfortably.

That gel wasn’t bad. It just wasn’t right for me, at that dose, at that point in a run. And I found that out on a training day instead of race day. That’s the whole point.

After that session I dialled caffeine right back — I now only use caffeinated gels strategically in the back half of long races, and at a much lower dose. That’s a lesson I wouldn’t have without that miserable day in the mountains.

Salt Tablets and Saving a Race in Orange

On the flip side, sometimes you discover something in training that becomes a non-negotiable part of your race kit.

I’d been dealing with cramping issues — the kind where your calves lock up on climbs and you’re standing on the trail trying to stretch it out while other runners shuffle past. I’d tried stretching more, foam rolling, adjusting my stride. Nothing consistently fixed it.

Then during a race in Orange, I started using salt tablets consistently — one every 30 minutes from the start, not waiting until cramps showed up. The difference was night and day. No cramps. Not at 30km, not at 50km, not on the climbs that usually triggered them. My legs just kept working.

Was it definitely the sodium? Maybe it was partly psychological. Maybe conditions were milder that day. But I’ve repeated it enough times since to know it’s a real part of the puzzle for me. Salt tablets are now in every race kit, every long run, every time. That’s the kind of confidence you can only build through repetition.

It’s Art and Science

Here’s the thing that most nutrition guides won’t tell you: race-day fuelling isn’t purely scientific. Yes, there are formulas for caloric expenditure and carbohydrate absorption rates. Yes, you should calculate your targets and train your gut systematically. That’s the science, and it matters.

But there’s an art to it too.

The art is knowing that your plan will need to flex on the day. Aid stations might not have what you expected. Your drop bag might be at the wrong checkpoint because you misread the race guide. Your stomach might rebel against your primary fuel source at hour eight even though it was fine in every training run. Weather might be hotter than forecast, changing your fluid and electrolyte needs completely.

The runners who handle this well aren’t the ones with the most rigid plans. They’re the ones who’ve tested alternatives.

Building in Flexibility

This is why I always recommend training with at least two or three fuel sources, not just your primary one. If your Plan A is a specific carb drink, what’s your Plan B? If the aid station has flat Coke and watermelon but not your preferred electrolyte mix, can you work with that?

Here’s how I think about it:

Primary fuel — This is what you carry. Your gels, your carb drink, your salt tablets. You’ve trained with these extensively. This covers 70–80% of your fuelling.

Tested alternatives — These are products you’ve tried in training and know you can tolerate. Maybe a different gel brand, maybe real food like rice balls or banana. These are your backup if your primary fuel starts causing issues.

Aid station wildcards — Coke, watermelon, chips, pretzels, soup at the later stations. You should have tried all of these at least once in training so nothing is a complete unknown. Flat Coke at 70km of a hundred-miler has rescued more races than any sports nutrition product ever invented.

The point isn’t to have a backup plan for every possible scenario. It’s to have enough experience with different fuel sources that you can make smart decisions on the fly without panicking.

The Training Runs That Matter Most

Not every training run needs to be a full nutrition rehearsal. But your key long runs — the ones at race-specific intensity and duration — absolutely should be.

Here’s the protocol I use:

8–12 weeks out: Start testing your planned race nutrition on every long run over 20km. Use your actual race products. Set timers for when you’ll eat, just like race day. Note what works and what doesn’t.

6–8 weeks out: Deliberately test alternatives. Try a different gel brand on one run. Use real food on another. Practise eating aid station-style food (Coke, fruit, salty snacks) during a run. Build your library of “things I know I can eat.”

4–6 weeks out: Run your full race-day nutrition plan on your longest training runs. Same products, same timing, same quantities per hour. This is your dress rehearsal. If something goes wrong, you still have time to adjust.

2–4 weeks out (taper): Shorter runs, but still practise fuelling at race intensity. Keep the habits sharp. Don’t introduce anything new.

What to Track

After every fuelled training run, note three things:

What did you eat and when? — Be specific. “Gel at 45 min” is useful. “Some gels during the run” is not.
How did your stomach feel? — Rate it. 1 (perfect) to 5 (disaster). Note when issues started.
How was your energy? — Any dips? Any points where you felt flat or bonked?

You don’t need a spreadsheet for this. A note in your phone after each run is enough. But you do need the data, because memory is unreliable. You won’t remember exactly which gel flavour caused that stomach issue three weeks ago unless you wrote it down.

Race Day: Execute, Then Adapt

If you’ve done the work, race day should feel familiar. You know your products. You know your timing. You know your backup options. The first few hours should be almost boring — just executing the plan you’ve rehearsed.

The adaptation comes later, when fatigue accumulates and your body starts responding differently. Maybe your gel tolerance drops after 60km. Maybe you need more salt than planned because it’s warmer than expected. Maybe you can’t face another sweet gel and need something savoury.

This is where all that training pays off. You’ve been here before — not in a race, but in training. You know that switching to Coke and watermelon for an hour isn’t failing, it’s adapting. You know that an extra salt tablet won’t hurt because you’ve taken them at this rate before. You know that backing off your calorie target slightly is better than forcing down fuel that’s going to come back up.

Confidence in your nutrition plan doesn’t come from the plan itself. It comes from the hours you’ve spent testing it.

The Bottom Line

Race-day nutrition is where training, preparation, and race execution all converge. It’s the thread that runs through everything — your long runs teach you what works, your preparation builds a plan around it, and your race-day execution brings it all together.

It’s equal parts art and science. The science gives you the numbers. The art is knowing when to stick to the plan and when to adapt. And the only way to develop that feel is through deliberate, consistent practice.

Never do anything on race day you haven’t done in training. But also: never stop experimenting in training so that race day holds no surprises.

Want to build a personalised race-day nutrition plan based on your weight, pace, and race conditions? Try RacePlan AI → It’ll generate a customised fuelling strategy with specific timing and quantities — the science half of the equation. The art? That’s on you.