How many grams of carbohydrate per hour should I take during HYROX?

There is no HYROX-specific figure. General guidance gives about 30–60 g per hour for sustained efforts of roughly 1–2.5 hours and much less for shorter ones. Where you fall depends on your expected time. Test any in-race plan in a full simulation.

Should I carb-load for HYROX?

General guidance links loading to events longer than about 90 minutes. If your expected time is in that range, a load may be reasonable to discuss with a sports dietitian and try in training. If you finish well under it, adequate everyday carbohydrate is the usual approach.

Is low-carb training useful for HYROX?

The consensus position favours adequate carbohydrate availability for high-intensity performance. Deliberate low-availability training is a specialised approach that should involve a qualified sports dietitian.

Do the stations use carbohydrate too, or just the running?

Hard, repeated high-intensity work relies heavily on carbohydrate, so the stations count as well as the running.

What if I feel flat halfway through my races?

Check pacing, sleep and total daily food first, then the pre-race meal, before any in-race product.

Carbohydrates and HYROX Fuelling

This page explains how carbohydrate guidance scales with duration and how to read portions on a label. It does not set a personal target; a sports dietitian can do that.

Order Meals — View This Week's Menu

How many carbohydrates do I need for HYROX? It depends on how long you race. General sports guidance scales carbohydrate with duration: more before and during longer efforts, and formal loading only for events beyond about 90 minutes. HYROX finishing times vary widely, so the right bracket depends on your own expected time, your body size and what your gut has tolerated in training.

See the current menu at order.smashmeals.com

Why HYROX athletes land in different carbohydrate brackets

HYROX publishes one fixed format: eight 1 km runs alternating with eight workout stations, so every athlete covers 8 km of running plus 8 stations. The stations and standards are in the official HYROX rulebook. Two athletes in the same event can finish far apart in time, and general carbohydrate guidance is organised by duration. So the same guidance can point them to different brackets.

There are three separate decisions: daily carbohydrate across training, the pre-race meal, and anything taken during the race. Daily and pre-race intake are where most people start. In-race intake is an individual experiment to test in a full simulation, partly because sled and carry stations make eating awkward.

Guidance scales with duration, and HYROX durations vary widely
Daily, pre-race and in-race carbohydrate are separate decisions
Stations make in-race eating physically awkward
Gut tolerance is personal and trainable only by testing

What the evidence says

The 2016 joint position statement on nutrition and athletic performance gives general ranges organised by duration. They include 1–4 g/kg of carbohydrate in the 1–4 hours before exercise longer than an hour, about 30–60 g per hour during sustained efforts of roughly 1–2.5 hours, small amounts or a mouth rinse for 45–75 minute efforts, and loading over 36–48 hours for events longer than about 90 minutes. These ranges were not developed in HYROX athletes. They show how guidance shifts with duration, which is why they are not simply wrong for HYROX and also cannot be copied blindly.

The contemporary carbohydrate review stresses scaling to duration and intensity. The 2026 consensus discussion keeps adequate availability mainstream. The systematic review of high-intensity functional training notes substantial mixed physiological stress, and that nutrition-intervention evidence in that population is limited.

How strong is this evidence? These are general sports-nutrition ranges, not HYROX trial results. We are not aware of a HYROX-specific fuelling study, so any precise grams-per-hour figure for HYROX is an extrapolation. The figures below are label arithmetic, not a recommendation for you.

Comparing portions is easier when you can read the current label of what you order. at order.smashmeals.com

A practical framework

Daily, through the training block

Carbohydrate that supports your running and station volume
Protein at each meal alongside it

Before: the pre-race meal

Carbohydrate-containing, familiar, eaten at your tested gap
Whether you also load in the days before depends on expected duration; decide it in race week

During: optional and individual

Only if tested in a full simulation
More relevant the longer your expected time; check your event's current rules

Label arithmetic (illustrative, dated values)

Honey sriracha salmon with rice: 39 g carbohydrate on its saved label
Add a 4 oz roasted sweet potato side (24 g): 39 + 24 = 63 g for the plate
Greek yogurt, granola and berries alone: 61 g, almost the same as that plate
Mixed fruit cup (18 g) added to the yogurt: 61 + 18 = 79 g
Values are from our September 24, 2026 snapshot; the current label controls

Real SmashMeals examples

Carbohydrate-containing examples from our September 24, 2026 menu snapshot, with the values saved on that date. Use them to compare portions, not as a current menu. Check the label on the item you order.

Saved catalog examples; recipes and nutrition may change before a meal is offered again.

Greek Yogurt, Granola, Fresh Mixed Berries — 380 cal, 27g protein, 61g carbs, 5g fat — Creamy Greek yogurt topped with gluten free granola and fresh mixed berries for a simple, protein rich breakfast that is light, refreshing, and easy to enjoy on the go.
Honey Sriracha Salmon served with Rice and vegetable — 398 cal, 32g protein, 39g carbs, 12g fat — Jasmine Rice Cauliflower Rice
Sweet Potato Black Bean Quesadilla Casserole — 394 cal, 12g protein, 70g carbs, 6g fat — Sweet potato and black bean quesadilla casserole, offered as a prepared entree. Review the ordering page for the available options and the package label for the complete ingredient and allergen information.
Roasted sweet potatoes 4oz — 130 cal, 2g protein, 24g carbs, 3g fat — 4 oz portion, roasted.

These examples are not a live inventory or price list. Check the ordering menu for current availability and prices before deciding. Explore the menu guide.

View live menu and prices at order.smashmeals.com

How to compare portions on a label (not a prescription)

Step 1

Get your own range from a sports dietitian, or from general guidance scaled to your expected race time

Step 2

Read the carbohydrate grams on each item's current label

Step 3

Add items to compare plates, e.g. 39 g + 24 g = 63 g using the dated values above

Step 4

Eat that plate before a simulation and note how it sat

The numbers show how to add up label values. They are not a target for you.

Where gluten-free actually fits

Our kitchen is 100% dedicated gluten-free because some people need it to be — coeliac disease, diagnosed gluten sensitivity, or a household that simply eats gluten-free. Removing gluten is not a performance strategy in itself, and there is no good evidence it improves output, recovery or inflammation in athletes without a medical reason. Gluten-free carbohydrate sources such as rice, potatoes and fruit work the same way. Oats and granola are only appropriate for coeliac athletes when labelled gluten-free, because regular oats can be cross-contaminated.

Frequently asked questions

How many grams of carbohydrate per hour should I take during HYROX?: There is no HYROX-specific figure. General guidance gives about 30–60 g per hour for sustained efforts of roughly 1–2.5 hours and much less for shorter ones. Where you fall depends on your expected time. Test any in-race plan in a full simulation.
Should I carb-load for HYROX?: General guidance links loading to events longer than about 90 minutes. If your expected time is in that range, a load may be reasonable to discuss with a sports dietitian and try in training. If you finish well under it, adequate everyday carbohydrate is the usual approach.
Is low-carb training useful for HYROX?: The consensus position favours adequate carbohydrate availability for high-intensity performance. Deliberate low-availability training is a specialised approach that should involve a qualified sports dietitian.
Do the stations use carbohydrate too, or just the running?: Hard, repeated high-intensity work relies heavily on carbohydrate, so the stations count as well as the running.
What if I feel flat halfway through my races?: Check pacing, sleep and total daily food first, then the pre-race meal, before any in-race product.

References

Independent research

2026 consensus discussion on carbohydrate availability in endurance sport — PubMed. Adequate carbohydrate availability remains the consensus approach for supporting endurance and high-intensity performance.
Contemporary review of carbohydrate for endurance performance — PubMed. Carbohydrate needs scale with the duration and intensity of endurance work rather than applying one intake to every athlete.
Systematic review of CrossFit / high-intensity functional training (2021) — PubMed. High-intensity functional training imposes substantial mixed aerobic and anaerobic stress, but nutrition-intervention evidence in this population is limited and generally low-to-moderate quality.

Organisation's own material

Nutrition and Athletic Performance — joint position statement (2016) — Academy of Nutrition and Dietetics / Dietitians of Canada / ACSM. Athletes benefit from individualized nutrition plans that account for health, sport, goals, environment and practical circumstances; adequate total energy and macronutrients remain foundational.
HYROX official rulebook — HYROX. HYROX's own published rulebooks setting the stations, order and movement standards for each division.
HYROX official race format and rulebook — HYROX. HYROX's own description of the race: 8 x 1 km runs alternating with 8 workout stations — 8 km of running plus 8 stations in total.

Fuel the training, not just the race at order.smashmeals.com

Nutrition needs vary with body size, training volume, goals, health conditions and competition demands. For individualised performance or medical nutrition, work with a qualified sports dietitian or clinician.

Editorially reviewed by SmashMeals for source accuracy in September 2026. Written from published research and each organisation's own current format documentation. It is not medical or individualised sports-nutrition advice, and no clinician reviewed it.

SmashMeals is not affiliated with, endorsed by, or sponsored by HYROX or its organisers. Race-format details are summarised from HYROX's own published rules; always check the current official rulebook for your event.

Last reviewed October 2026.

Order Meals — View This Week's Menu