HYROX Nutrition Guide: Fuelling & Hydration Tips

Getting your HYROX Nutrition and Hydration right can make a big difference to how you feel and perform on race day.

HYROX combines eight 1km runs with eight functional workout stations, creating a unique challenge that requires endurance, strength and the ability to maintain a high intensity for a prolonged period.

That means your HYROX nutrition strategy needs to provide enough carbohydrate and fluid to support performance without leaving you feeling heavy or uncomfortable when running, pushing the sled or tackling burpees.

So, what should you eat before HYROX? Do you need to fuel during the race? And should you take electrolytes?

Here’s how to build your HYROX race-day nutrition plan.

What Is HYROX?

HYROX is a fitness race combining running with functional exercise.

Every athlete completes the same format:

• 1km run
• 1,000m SkiErg
• 1km run
• 50m sled push
• 1km run
• 50m sled pull
• 1km run
• 80m burpee broad jumps
• 1km run
• 1,000m rowing
• 1km run
• 200m farmers carry
• 1km run
• 100m sandbag lunges
• 1km run
• 100 wall balls

In total, that’s 8km of running and eight workout stations.

Depending on your category, fitness and experience, you could be racing for anything from around an hour to well over two hours. Your nutrition strategy should reflect how long you expect to be competing.

HYROX Nutrition: How to Fuel for Race Day

Carbohydrate is an important fuel source for high-intensity exercise, making it a key part of your HYROX utrition strategy.

However, race-day fuelling doesn’t begin on the start line.

The meals and snacks you eat before your race can help ensure your carbohydrate stores are topped up and you’re ready to perform.

For most athletes, the priorities are simple:

Carbohydrate, hydration and foods you know your stomach tolerates.

Race day isn’t the time to experiment with a completely new breakfast, supplement or fuelling strategy.

What Should You Eat Before HYROX?

Aim to eat your main pre-race meal around 2–4 hours before your start time.

This should be predominantly carbohydrate based, with foods that are relatively low in fat and fibre to make them easier to digest.

Good pre-HYROX meal options could include:

• Porridge with banana and honey
• Toast or bagels with jam
• Rice with a small amount of protein
• Cereal with milk
• Pancakes with banana
• A familiar carbohydrate-based breakfast you’ve used successfully in training

The exact amount you need will depend on your body size, appetite, start time and how well you tolerate food before intense exercise.

The most important thing is to practise your pre-race HYROX nutrition during training rather than leaving it until race day.

Should You Eat Just Before HYROX?

If there’s a long gap between your main meal and race start, a smaller carbohydrate snack can help provide some additional energy.

Something easily digestible around 30–60 minutes before racing may work well.

This could be a banana, sports drink or an easy-to-eat energy product such as a VOOM Pocket Rocket.

Keep it simple. You don’t want to start a HYROX race feeling overly full.

HYROX Hydration: How Much Should You Drink?

Hydration is another important part of your HYROX nutrition strategy.

Arriving at the start line already dehydrated means you’re immediately putting yourself at a disadvantage.

Rather than drinking a huge amount immediately before racing, aim to hydrate consistently throughout the day leading into your event.

Your individual fluid requirements will depend on factors including:

• How much you sweat
• Your body size
• The temperature
• How long you’re racing
• How much you’ve already drunk
• Your individual sweat sodium concentration

Remember that drinking more isn’t automatically better. The goal is to arrive at the start line appropriately hydrated, rather than consuming excessive amounts of fluid immediately beforehand.

Do You Need Electrolytes for HYROX?

When you sweat, you lose both water and electrolytes – particularly sodium.

Electrolyte drinks can therefore be useful before HYROX, particularly if you’re a heavy or salty sweater, racing in warm conditions or have a longer expected finish time.

Rather than relying solely on plain water, an electrolyte drink before your race can provide both fluid and important electrolytes.

VOOM Hydrate Rapid Electrolyte is designed for rapid hydration and can be used before exercise to help you start properly hydrated.

Again, make sure you’ve tested your hydration strategy during training first.

Should You Drink During a HYROX Race?

Whether you need to drink during HYROX depends largely on how long you’re going to be racing.

An athlete finishing in around an hour has very different requirements from somebody who will be on the course for two hours or more.

For faster athletes, good hydration before the race may be enough, potentially supplemented with small amounts of fluid available on course.

As your expected race duration increases, drinking during the event becomes increasingly important.

Don’t feel that you need to drink at every opportunity. Your aim is to drink according to your individual requirements rather than simply consuming as much fluid as possible.

Do You Need Carbohydrates During HYROX?

Again, this depends on your expected finish time.

Your body stores carbohydrate as glycogen in your muscles and liver, providing readily available energy during high-intensity exercise.

For shorter HYROX races, your pre-race meal and existing glycogen stores may provide much of the energy you need.

However, athletes racing for longer may benefit from consuming additional carbohydrate during the event.

As a general guide, athletes exercising for 1–2.5 hours can often benefit from consuming approximately 30–60g of carbohydrate per hour.

The important word here is approximately.

Your optimal intake depends on your body, race duration, intensity and how much carbohydrate your stomach can comfortably tolerate.

HYROX Nutrition Plan by Expected Finish Time

Your HYROX nutrition strategy should reflect how long you expect to be racing.

HYROX Under 60 Minutes

Your biggest priorities are likely to be pre-race carbohydrate and hydration.

With a relatively short race duration, you may not need significant amounts of carbohydrate during the event.

Focus on arriving at the start line well fuelled and hydrated.

HYROX in 60–90 Minutes

Pre-race nutrition remains extremely important.

Some athletes may also benefit from a small amount of easily consumed carbohydrate shortly before or during the race, particularly towards the upper end of this duration.

Practise this during your HYROX training sessions to find out what works for you.

HYROX in 90 Minutes–2.5 Hours

Fuelling during the event becomes more important as race duration increases.

Consuming around 30–60g of carbohydrate per hour can help provide additional energy during prolonged exercise.

The challenge with HYROX is finding products you can comfortably consume while alternating between running and functional stations.

Easy-to-eat and easy-to-digest carbohydrates can therefore be particularly useful.

HYROX Over 2.5 Hours

If you expect to race for more than two and a half hours, your carbohydrate and hydration requirements become increasingly important.

You may benefit from a more structured fuelling plan that provides regular carbohydrate throughout the race.

This is something worth practising extensively in training so you know exactly what your stomach can tolerate while exercising at HYROX intensity.

Practise Your HYROX Fuelling in Training

One of the biggest nutrition mistakes you can make is trying something new on race day.

Use your longer and more race-specific training sessions to practise:

• Your pre-race breakfast
• Meal timing
• Hydration
• Electrolyte intake
• Pre-race snacks
• Carbohydrate intake during exercise
• Any caffeine or performance supplements you intend to use

This is effectively gut training.

Just as you train your legs to run after sled pushes and lunges, you can practise consuming carbohydrate and fluid while exercising.

By race day, your nutrition plan should feel familiar.

What About Caffeine for HYROX?

Caffeine can help support alertness and exercise performance, but more isn’t necessarily better.

If you regularly use caffeine before training, you may choose to incorporate it into your HYROX race-day strategy.

However, consider how much you’re consuming across coffee, energy products and supplements.

Taking several caffeine products together can quickly result in a much higher dose than intended.

As with your nutrition, practise your caffeine strategy before race day.

Can Sodium Bicarbonate Help HYROX Performance?

Sodium bicarbonate is another supplement that may be particularly relevant to HYROX because of the repeated periods of high-intensity exercise.

During intense exercise, increasing acidity within working muscles is associated with fatigue. Sodium bicarbonate acts as an extracellular buffer, helping the body manage the hydrogen ions produced during high-intensity exercise.

Research suggests sodium bicarbonate supplementation can benefit certain types of high-intensity exercise performance.

However, traditional high doses of sodium bicarbonate can also cause gastrointestinal discomfort in some athletes.

If you’re considering using sodium bicarbonate for HYROX, test it during training well before race day and follow an appropriate dosing strategy.

Your HYROX Race-Day Nutrition Checklist

Ultimately, the best HYROX nutrition plan is one you’ve practised and know works for you.

Before race day, make sure you’ve considered:

• Carbohydrates: Start with your glycogen stores topped up.
• Pre-race meal: Eat a familiar carbohydrate-rich meal around 2–4 hours before racing.
• Hydration: Arrive appropriately hydrated rather than trying to catch up immediately before the start.
• Electrolytes: Consider replacing electrolytes lost through sweat.
• Race fuel: The longer your expected finish time, the more important carbohydrate during the race becomes.
• Caffeine: Know your dose and practise it beforehand.
• Supplements: Never introduce a new performance supplement for the first time on race day.
• Gut training: Test your complete strategy during race-specific training.

There isn’t one perfect HYROX nutrition strategy that works for everyone.

A sub-60-minute athlete and somebody racing for more than two hours have very different requirements. Build your strategy around your expected finish time, sweat rate, carbohydrate tolerance and personal preferences.

Practise it in training, refine what works and arrive on the HYROX start line knowing your nutrition is one less thing to worry about.