Triathlon Race-Week Nutrition: How to Eat the Week Before

Strip away the noise and eating the week before a triathlon comes down to three things:

1. Top up your glycogen — the carbohydrate stored in your muscles, your main race fuel — by leaning your diet a bit more toward carbs as the race nears.
2. Stay well hydrated, with a little extra sodium, especially if it'll be hot.
3. Protect your gut by eating familiar, lower-fibre food in the last day or two and introducing nothing new.

That's the whole framework. The complication people run into is treating it as a rigid formula with exact gram counts — when in reality how much any of this matters depends heavily on your race distance, and the right amounts are personal.

This page coordinates the week; the detailed pieces each have their own guide, which it links to as we go. Think of it as the conductor, not every instrument. And one caveat up front: everything below is general guidance and the numbers are ranges to test, not prescriptions — for a high-stakes race, or if you have any medical condition or a history of disordered eating, work with a sports dietitian.

The single most important adjustment is one the internet usually skips: match the effort to the distance. Full carb-loading is for long, glycogen-depleting races — applying it to a short one just leaves you bloated.

• Sprint and Olympic (roughly up to ~2–3 hours): you barely need to change anything. Eat your normal balanced diet, maybe lean slightly more toward carbs the day before and on race morning, and focus on a familiar, tested breakfast. A heavy two-day carb-load is unnecessary — these distances don't deplete glycogen the way long-course does.
• 70.3 (middle distance): now carbohydrate top-up and hydration planning start to genuinely matter, because you'll be out there for hours drawing on those stores.
• Full distance (Ironman): this is where a deliberate carb-load and careful hydration in the final days earn their place — the day is long enough that arriving with full tanks changes your race.

So before you copy any "eat X grams" plan, ask which distance it was written for. The comparison table below summarises how much actually changes at each. Everything that follows is written for the longer end; scale it down for shorter races.

As race week arrives your training volume drops — and a common mistake is to slash your eating to match. Resist it. You're still recovering from a hard training block and, for longer races, topping up your fuel stores, so a big calorie cut works against both.

The sensible approach through the first part of the week is to eat close to normal, keeping meals balanced (carbohydrate, protein, some fat, vegetables), and simply let your appetite and the lighter training settle your intake naturally. You don't need to force-feed, and you don't need to diet — either extreme undermines how fresh and fuelled you arrive.

If anything, this is the week to prioritise consistency and familiarity over precision: regular meals, plenty of fluid, good sleep. The race-week schedule and taper guide cover the training side that your nutrition is supporting.

For longer races, the core of race-week nutrition is gradually shifting your diet toward carbohydrate in the final couple of days so your muscles store more glycogen. Sports-nutrition reviews support a higher carbohydrate intake in the day or two before a long endurance event — but the exact amount is individual, and the figures you'll see quoted (often in grams per kilogram of body weight) are starting ranges to test in training, not targets to hit exactly.

Practical version: in the last day or two before a long race, make carbs the centre of each meal and add carb-rich snacks, favouring easily digested, lower-fibre sources — white rice, pasta, potatoes, bread, oats, bananas, and sports drinks or juice if you struggle to eat enough solid food. Spread it across the day rather than in one giant meal.

The detailed how-to — including how much, how to spread it, and what it does — lives in carb-loading for beginners; this page's job is to place it in the week. And remember: for a sprint or Olympic, a light lean toward carbs is plenty.

The goal race week is to arrive normally hydrated, not over-hydrated. Drink to thirst and to pale (not clear) urine across the week, and there's rarely a need to force large volumes.

On sodium: some extra salt in the last day or two — through salted food, soups or electrolyte drinks — can help you hold onto fluid and is sensible before a hot race. But treat it as a modest addition, not a mandate, and don't overdo it.

The crucial safety point that many enthusiastic race-week plans miss: over-drinking is genuinely risky. Taking on far more fluid than you need can dilute your blood sodium and cause hyponatraemia, which can be dangerous — so more is not better with either water or salt. Both extremes carry risk. Match fluid to your needs, use sodium in moderation, and let the dedicated hydration and electrolytes guides cover the physiology. If you sweat heavily or race in heat, testing your own sweat response in training beats any generic number.

Nothing ruins a race faster than a gut that isn't ready, so the last day or two are about making digestion easy:

• Ease off high-fibre foods — large quantities of whole grains, raw vegetables, beans and salads — in the final day or two. Fibre is genuinely good for you the rest of the year; it's just extra ballast right before a race.
• Go easy on heavy fats — fried, creamy or very rich dishes sit heavily and slow digestion.
• Keep it familiar. This isn't the week for a new restaurant, a new cuisine or a new supplement.
• Mind food safety. A bout of food poisoning is race-ending, so it's wise to be cautious with higher-risk foods like raw shellfish or undercooked meat in the days before, especially when travelling.

The golden rule ties it together: if you wouldn't eat it before a hard three-hour training session, don't eat it race week. If you have a sensitive stomach, training your gut in advance with gut-training does more than any race-week tweak.

A few lifestyle factors matter as much as macros in race week:

• Alcohol: it's worth easing right off in the days before a race. It disrupts sleep and hydration and does nothing helpful for recovery or fuelling — save the celebration for after the finish line.
• Caffeine: keep to your normal habit. If you usually have a coffee, there's no need to quit; if you plan to use caffeine as a race-morning boost, test the timing and amount in training rather than trying it for the first time on race day.
• Sleep: this is the quiet giant. The night before the race is often poor from nerves, so the nights earlier in the week are the ones that count — protect them. No amount of carb-loading offsets a week of bad sleep.

None of this is dramatic; it's about removing the obvious things that would blunt an otherwise good taper.

The night before gets over-thought. It is not the meal that makes or breaks your race — the days before it did the fuelling — so the aim is simply a familiar, carb-based dinner that sits well and sets you up to sleep.

Keep it recognisable and moderate: a normal-sized portion of something you've eaten before hard sessions (pasta, rice, potatoes with a lean protein and a little cooked veg), not a record-breaking plate of food. A huge "last supper" is more likely to disturb your sleep and your gut than to add meaningful fuel.

Hydrate through the evening, then ease off fluids before bed so you're not up all night. For the specifics — timing, portion and what to choose — see the dedicated night-before nutrition guide; this page just makes sure it fits the week.

Race-morning eating is its own detailed topic, but the principles are simple and this is where they land after a good week:

• Eat a familiar, mostly-carb, lower-fibre, lower-fat breakfast a few hours before the start — the common guidance is roughly two to three hours ahead, adjusted to your gut and the start time.
• Choose what you've rehearsed — porridge, toast, a bagel, a banana, a sports drink — never something new.
• Sip fluid with some electrolyte through the morning, and be sensible about tapering it before the swim so you're comfortable at the start.

The exact timing, amounts and options — including how to handle a very early start or a nervous stomach — are in race-day breakfast and breakfast timing, and the whole morning is sequenced in the race-morning routine. Then your in-race plan takes over — see race fuelling.

If you remember one thing, make it this: nothing new on race day, or in the days before it. Every food, drink, gel and supplement you'll use should already be tested in training, because race week is exactly the wrong time to discover a food disagrees with you. The whole point of the week is to remove variables, not add them.

Equally important is knowing the limits of a general guide. Race-week nutrition is individual, and the numbers that float around online are population ranges, not your prescription. For a high-stakes race (your first long-course, a goal event), a medical condition that affects diet (such as diabetes), or any history of disordered eating or under-fuelling, this is the moment to work with a qualified sports dietitian rather than a checklist. Fuelling should make you feel prepared and calm — if it's becoming a source of anxiety or restriction, that's a signal to get proper support.

Race-week nutrition is three jobs — top up glycogen, hydrate with a little extra sodium, protect your gut — scaled to your distance and rehearsed in advance. Sprint and Olympic racers barely change their normal eating; long-course athletes lean into carbohydrate and hydration in the final days. Keep the numbers as ranges to test rather than targets to obsess over, don't crash your intake just because training eased, and introduce nothing new.

Do that and you'll arrive at the start line fuelled, hydrated and calm — which is exactly what good race-week nutrition is for.

For the pieces: carb-loading for the fuel top-up, night-before nutrition and race-day breakfast for the final meals, race fuelling for the race itself, and the race-week schedule for the training side it all supports.