Swiss pre-race science

60 minutes.
8 stations.
One shot before you start.

Get the Pre-Activity Shot

A Swiss cellular shot that fuels the engine that has to hold for 60 to 90 minutes of hybrid effort. Not a gel, not a pre-workout. Ready 30 to 60 minutes before you start.

The science
4.87 · 675 reviews
“The runs between stations felt manageable and I didn't hit the wall at the wall balls.”Emma Verhoeven “The first thing that gave me a steady heart rate across all 8 stations.”Thomas De Wilde “Steady the whole way, and I actually had energy for the last run between stations.”Sarah Thompson “Went from 1:18 to 1:04 in a year. The engine is finally starting to hold.”Kevin O'Brien “No crash, just steady energy across the whole session.”Jasper Nielsen “My heart rate stays lower for the same pace on the runs.”Robert Meijer
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Pre-Activity Shot

Race-ready in one 60ml shot.

A Swiss formula that fuels your mitochondrial engine for 60 to 90 minutes of hybrid effort. A steady curve rather than a spike, and no gel sitting in your stomach.

  • Prime your engine before the gun
  • Hold pace on the runs between stations
  • Steady energy without the gel gut
€29,90 €25,42
  • Ships within 24 hours
  • 30-day money-back guarantee
How do I take the Pre-Activity Shot?

One 60ml shot 30 to 60 minutes before you start. On race day, drink it as your warmup begins. Shake well and drink cold.

How often should I drink OLEUS?

Take Pre-Activity before every race and every hard session. Add OLEUS Daily every morning to build cellular energy across the training block, not just on the day.

Can I pause or cancel my subscription?

Anytime, from your account. No calls, no forms: pause, skip or cancel in one click.

The problem

You trained the stations. You trained the runs. Nobody trained your fuel.

Months of prep. SkiErg intervals, sled sessions, tempo runs on tired legs. Then race morning comes and the fuel plan is a gel from a friend, a pre-workout scoop, and pasta the night before. Hyrox rewards the engine that holds. Not the athlete who went out fastest.

  1. Went out too hot at the start

    Sub-60 pace on paper. Cooked calves after the sled push. The whole plan falls apart before station four, and the runs between stations turn into damage control.

  2. Gut goes at the wrong moment

    The gel at warmup comes back up on the burpee broad jumps. The pre-workout hits and fades. Station five turns into survival instead of a target split.

  3. Nothing left for the wall balls

    The carb load carried you to the row. Then the drop. Legs go, heart rate spikes, and the 100 wall balls that were supposed to be where you empty the tank turn into a fight for the finish.

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You trained the stations. You trained the runs. Nobody trained your fuel.

How it works

Prime, sustain, protect. Race-day fuel in one shot.

Prime

OLEUS actives prime your mitochondrial engine before the gun. You set the tone at the SkiErg without emptying the tank, and the engine is ready for every run between every station.

Sustain

A steady cellular fuel curve for 60 to 90 minutes of hybrid effort. The engine that holds at high heart rate is the one that decides your run splits after the sled.

Protect

No gel to swallow and nothing to chew mid-race. One 60ml shot before your warmup and the fueling is done, so your stomach stays out of the story through the burpee broad jumps.

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Trusted by 10,000+ athletes.

Excellent 4.87 based on 675 reviews
Thomas De Wilde

Pre-Activity Shot

Roadtosub60 for two years and my nutrition was the missing piece. Gels wrecked me at Mechelen, pre-workout crashed me at Amsterdam. Pre-Activity is the first thing that gave me a steady heart rate across all 8 stations. Held 4:15 pace on the runs after the sled push. 58:47 in Rotterdam. Sub 60 finally.

Antwerp, Belgium

Emma Verhoeven

Pre-Activity Shot

Onze eerste Hyrox and I was scared to blow up on the SkiErg like I did in training. My friend swore by OLEUS so I took one before the warmup. The runs between stations felt manageable and I didn't hit the wall at the wall balls. 1:26:14 for our first one and I'm already signed up for Utrecht.

Ghent, Belgium

Sarah Thompson

Pre-Activity Shot

Trained for four months and was terrified of the wall balls. My coach told me to try Pre-Activity 45 minutes before the gun. Steady the whole way, and I actually had energy for the last run between stations. 1:22 for a first-timer and no gel gut. Doing Manchester in March.

Bristol, UK

Nina van der Meer

Pre-Activity Shot

I'm the person who reads everything before buying. 4.87 stars, 675 reviews, and a formula that lists every dose on the label was what convinced me. Took Pre-Activity for three race simulations before Utrecht, then race day. First Hyrox at 1:18:22, no gut issues, no crash, and I finished the wall balls with something in the tank. Ordering again.

Utrecht, Netherlands

Kevin O'Brien

Pre-Activity Shot

Two years of CrossFit and my ego said Hyrox would be easy. First time I did it, my calves cooked after the sled push and I nearly walked the second half. Now I run three times a week and take Pre-Activity before every race and every long session. Went from 1:18 to 1:04 in a year. The engine is finally starting to hold.

Dublin, Ireland

Inside the shot

Six actives. Built for endurance.

Oleuropein100mg

Primes mitochondrial function.

L-citrulline675mg

Supports blood flow and helps maintain ATP.

Acetyl-L-carnitine375mg

Helps delay fatigue.

Magnesium56mg

Supports electrolyte balance.

Vitamin C40mg

Supports energy metabolism.

B vitaminsB1, B2, B3, B5, B6

Support energy metabolism.

The science

Not a gel. Not a pre-workout. Cellular fuel for the race.

OLEUS Pre-Activity works inside the mitochondria, the engines that convert fuel and oxygen into steady power. Ready about 30 minutes after you drink and built to hold through the full race.

Learn about the science

  1. Complex nutrients

    Fuel, vitamins and oxygen arrive in the cell: raw inputs with no usable charge of their own.

  2. Mitochondria

    OLEUS actives work inside the mitochondria, the engines that convert those inputs into steady power.

  3. Cellular energy

    ATP is released as steady, lasting energy across 60 to 90 minutes.

The subscription

More than a subscription.

Your race-day fuel arrives before the next start line.

  • Save 15% on every delivery
  • Free shipping on orders over €70
  • Pause, skip or cancel anytime
Get the Pre-Activity Shot
More than a subscription.

Frequently asked questions

Take the Pre-Activity Shot 30 to 60 minutes before you start. On race day, drink it as your warmup begins. Shake well and drink cold.

A steady curve, not a spike. You will not feel a rush at the start line. What you will notice is holding pace on the runs after the sled push, and having something left for the wall balls. Cellular actives work at the mitochondrial level, so the difference shows in what your engine can sustain, not in how wired you feel.

Pre-workouts hit fast and fade fast. Gels are designed to be taken during the effort and can sit heavy. Pre-Activity is a cellular fuel taken before you start: it works inside the mitochondria to support steady energy across the full race.

We ship across Europe from our warehouse, with orders dispatched within 24 hours. Shipping is free on orders over €70.

Every batch is formulated and lab-tested in Switzerland. The full active list and doses are disclosed on the label and in the ingredient section above.