Hyrox athlete with natural muscle gain supplements

7 natural supplements for muscle gain in Hyrox athletes

Nutrition can make or break your Hyrox performance, and building lean muscle naturally takes the right support. If you want more strength, better recovery and more endurance, here are 7 natural options with research behind them.

Table of contents

Quick summary

Takeaway What it means
1. Use whey isolate for muscle growth Whey isolate is purer with less lactose, and helps recovery and growth after training.
2. Add creatine for power Creatine monohydrate supports strength and power for high-intensity training.
3. Take BCAAs around training 5-10g of BCAAs in a 2:1:1 ratio helps repair and reduces soreness.
4. Choose a natural pre-workout Natural blends with green tea caffeine and beta alanine give steady energy and support endurance.
5. Watch your electrolytes Aim for 500-700mg of sodium an hour in long sessions.

1. Whey protein for lean muscle

Whey protein comes from milk during cheesemaking and is a complete protein with a strong amino acid profile for recovery and growth.

It gives you all 9 essential amino acids your body can't make. Taken after training, it switches on muscle protein synthesis to repair and rebuild muscle. Our guide to protein in pre-workout nutrition explains why timing matters.

Whey digests fast, so amino acids reach your muscles quickly, which helps recovery and lean muscle. That makes it a good fit for athletes doing both strength and endurance work.

Go for whey isolate for purity and less lactose. Aim for 20-25g per serving, ideally within 30 minutes of training.

Tip: grass-fed whey can mean better nutrient quality and less exposure to added hormones or antibiotics.

2. Creatine monohydrate for explosive power

Creatine monohydrate is one of the best-researched supplements for power. It occurs naturally in the body and plays a big part in energy production and strength.

It works by raising phosphocreatine stores in muscle, which speeds up ATP regeneration. In Hyrox, that helps the short, explosive parts: sled pushes, burpee broad jumps and quick changes of pace.

Studies show creatine can improve upper and lower body strength, including bench press, vertical jump and peak power. Our guide to workout supplements covers how it fits with the rest.

A common approach is a loading phase of 20g a day for 5-7 days, then 3-5g a day. Taking it with carbs can help uptake. You can also skip loading and take a steady daily dose, which fills your stores over a few weeks.

Tip: take it every day and stay well hydrated. Interval Creatine is 300g, 100 servings of 3g, for £12.99.

3. Branched-chain amino acids for recovery

Branched-chain amino acids (BCAAs), leucine, isoleucine and valine, support muscle repair and help reduce fatigue after training.

Research on muscle protein synthesis shows BCAAs switch on key repair pathways. Leucine activates mTOR signalling, which drives repair and growth after hard sessions.

BCAAs can reduce soreness, lower inflammation markers and speed repair. Our guide to intra-workout supplements covers how to use them during training.

Take 5-10g before and after training, in a 2:1:1 ratio of leucine, isoleucine and valine.

Tip: choose good quality BCAAs and stay hydrated.

4. Natural pre-workout blends for stamina

Natural pre-workout blends give clean, steady energy using ingredients with research behind them.

Natural pre-workouts usually combine green tea caffeine, beta alanine and nitric oxide boosters for endurance and focus, with a smoother energy curve and less of a crash.

Beta alanine buffers acid build-up and delays muscle fatigue. Beetroot extract supports nitric oxide, improving blood flow and oxygen delivery. Natural caffeine from sources like guarana keeps you alert with fewer jitters.

Take your pre-workout 30-45 minutes before training. Doses vary by product and tolerance, so follow the label.

Tip: Pre-Shot is a 60ml shot with 200mg caffeine and 400mg beetroot extract, so there's nothing to mix.

5. Electrolytes for hydration and endurance

Electrolytes keep your fluid balance, muscle function and output on track.

Our guide to getting your electrolyte intake right explains how balanced sodium, potassium and chloride help performance. Research shows oral rehydration drinks with amino acids can help the body hold on to fluid better than plain water.

Sodium controls fluid balance and nerve signals, and potassium supports muscle contraction and helps prevent cramps. In hard Hyrox sessions you lose a lot of both in sweat, so replacing them keeps you going.

Most athletes do well on 500-700mg of sodium and 200-300mg of potassium an hour in long sessions. Small, regular doses work better than big ones.

Tip: weigh yourself before and after training to work out how much you need to replace.

6. Omega-3s for less muscle inflammation

Omega-3 fatty acids support recovery and help manage inflammation after hard training.

Research shows EPA and DHA help regulate inflammation, reducing muscle damage and oxidative stress, which supports recovery and helps preserve muscle.

1000-2000mg a day of combined EPA and DHA can help with muscle soreness, support protein synthesis and help repair. That's useful when you're training hard week after week.

Choose good quality fish oil or algae oil with tested purity. Sustainably sourced, third-party tested options are the most reliable.

Tip: take omega-3s with a meal that contains some fat to help absorption and avoid stomach upset.

7. Vitamin D for muscle function

Vitamin D supports muscle protein synthesis, strength and how your muscles work.

A systematic review on muscle performance found vitamin D can improve muscle strength, especially in athletes with low starting levels.

Good vitamin D levels may help maximal strength, power and injury risk. Athletes with blood levels of 25(OH)D below 75 nmol/L respond most to supplements, so it pays to know your numbers.

Typical doses for athletes are 1000-2000 IU a day, depending on your blood levels, sun exposure and health. Oily fish, egg yolks and fortified foods help too.

Tip: get a blood test before you start so you can take the right amount.

Here's a summary of all 7:

Supplement Key benefits How to use it
Whey protein Supports muscle protein synthesis and recovery after training. 20-25g within 30 minutes of training.
Creatine monohydrate Supports explosive power and ATP regeneration. Load with 20g a day for 5-7 days, then 3-5g a day.
BCAAs Helps recovery and reduces fatigue. 5-10g before and after training, 2:1:1 leucine, isoleucine, valine.
Natural pre-workout Steady energy, endurance and focus. 30-45 minutes before training, dose as per the label.
Electrolytes Hydration, fluid balance and fewer cramps. 500-700mg sodium and 200-300mg potassium an hour in long sessions.
Omega-3s Reduces inflammation and supports recovery. 1000-2000mg EPA and DHA a day, with meals.
Vitamin D Supports muscle function and strength. 1000-2000 IU a day, plus food sources.

Natural nutrition for muscle gain

Protein, creatine and electrolytes help you build muscle, recover and keep going in hard Hyrox training. Our Interval pre-workout range and Interval electrolytes are made in the UK with no artificial additives.

Interval

See the full range at Interval.

Frequently asked questions

What are the main natural supplements for muscle gain in Hyrox athletes?

Whey protein, creatine monohydrate, BCAAs, natural pre-workout, electrolytes, omega-3s and vitamin D.

How should I take whey protein?

20-25g within 30 minutes of training, when muscle protein synthesis is switched on.

Either load with 20g a day for 5-7 days then take 3-5g a day, or take 3-5g a day from the start.

When is the best time to take BCAAs?

5-10g just before or after training, to help recovery and soreness.

How much sodium and potassium do I need in long sessions?

Aim for 500-700mg of sodium and 200-300mg of potassium an hour.

What role does vitamin D play in muscle performance?

It supports muscle protein synthesis and strength. Typical doses are 1000-2000 IU a day, ideally guided by a blood test.

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