Swiss endurance science

Delay the burn.
Extend the run.

OLEUS Pre-Activity helps you hold energy, focus and power through long training sessions and race day. Taken before you run, it supports your muscles so you can keep going for longer.

30% off this week. Spend 100 EUR on Pre-Activity and your Post-Activity 6-pack is free.

The science
4.87 · 675 reviews
“I used to fade after 30k. This block I finally ran the negative split I had been chasing, and the legs were there from km 1 to 42.”Sophie Laurent, Lyon, France “Taken about an hour before my long run, the pace that used to break me held to the end.”Luca Bianchi, Bologna, Italy “A friend told me to just try it once. I signed up for my first marathon terrified of the wall, and I ran it all the way out to the line.”Thomas Vermeer, Utrecht, Netherlands “First long race where the last 10k did not fall apart. I finished strong instead of surviving.”Nina Andersen, Aarhus, Denmark “No sugar, nothing sitting heavy. I take it before I run and my stomach finally agrees.”Anna Müller, Freiburg, Germany “The big weeks used to leave me wrecked. Now I hold my effort and keep showing up.”Emma Collins, Bristol, England
Cart
Pre-Activity Shot
Pre-Activity Shot
Pre-Activity Shot
Pre-Activity Shot

Pre-Activity shot

Endurance boost in a 60ml shot.

A Swiss formula built for long efforts, hard sessions and race-day performance.

  • Hold your pace when fatigue kicks in
  • Give working muscles the support they need
  • Stay focused and energised for longer
Pack size
€29,90 €20,93
30% off

Summer Sale

Ends 21 July

Sitewide discount, automatically applied at checkout.

  • 30% off this week. Spend 100 EUR on Pre-Activity and your Post-Activity 6-pack is free.
  • Ships within 24 hours
  • 30-day money-back guarantee

The gift

Spend 100 EUR, the recovery is on us.

Order 100 EUR of Pre-Activity this week and we add a free 6-pack of Post-Activity, the shot for after your hard sessions! It is added automatically at checkout.

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The problem

Fuel gets you started. Energy production keeps you moving.

Long efforts demand more from your energy system. As fatigue builds, power drops, pace becomes harder to maintain, and every kilometre costs more.

  1. Fatigue sets in

    Your legs grow heavier, your effort rises, and the pace that felt comfortable becomes harder to hold.

  2. Power starts to fade

    As the session gets tougher, your output drops and your body begins slowing down before the finish.

  3. Fuel alone is not enough

    Gels provide carbohydrates, but your cells still need to turn that fuel into usable energy to keep you performing.

Fuel gets you started. Energy production keeps you moving.
Fuel gets you started. Energy production keeps you moving.
Fuel gets you started. Energy production keeps you moving.

How it works

Prime, power, perform. Pre-Activity in one shot.

Prime

Big efforts demand more from your energy system. Oleuropein helps activate the mitochondria, so your body is better prepared to turn fuel into usable energy.

Power

When intensity rises, performance starts to drop. Caffeine from guarana helps you stay sharp, maintain output, and keep pushing for longer.

Perform

L-citrulline supports blood flow and oxygen delivery to working muscles, helping you sustain your effort when the session or race gets tough.

Trusted by endurance runners across Europe.

Excellent 4.87 based on 675 reviews Rated 4.87 out of 5 from 675 reviews.
Sophie Laurent

Pre-Activity Shot

I used to fade after 30k. This block I finally ran the negative split I had been chasing, and the legs were there from km 1 to 42.

Lyon, France

Thomas Vermeer

Pre-Activity Shot

A friend told me to just try it once. I signed up for my first marathon terrified of the wall, and I ran it all the way out to the line.

Utrecht, Netherlands

Emma Collins

Pre-Activity Shot

The big weeks used to leave me wrecked. Now I hold my effort and keep showing up.

Bristol, England

Anna Müller

Pre-Activity Shot

No sugar, nothing sitting heavy. I take it before I run and my stomach finally agrees.

Freiburg, Germany

Nina Andersen

Pre-Activity Shot

First long race where the last 10k did not fall apart. I finished strong instead of surviving.

Aarhus, Denmark

Inside the shot

Six actives. Built for endurance.

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. Endurance powered by your mitochondria.

OLEUS formulas target the mitochondria, the organelles that convert fuel, water, and oxygen into energy. The result? Higher energy efficiency for lasting endurance.

Not a gel. Endurance powered by your mitochondria.

The subscription

More than a subscription.

Your Pre-Activity protocol arrives before you run out.

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

Frequently asked questions

Take one shot about one hour before a long run, hard session, or race. Limit to one shot per day.

No. A gel gives you carbohydrates during the run. Pre-Activity is taken before you run and supports how your body turns fuel into usable energy, so it works alongside your gels rather than replacing them.

One 60ml shot with 100mg oleuropein, caffeine from guarana, L-citrulline, acetyl-L-carnitine, magnesium, and B and C vitamins. Neutral flavour with a hint of blueberry and a mild bitterness from the olive leaf extract. Best served chilled.

You take it about an hour before you start, not during, so it sits well ahead of the effort. It contains no ingredients designed to be taken mid-run.

Pre-Activity is built on oleuropein for mitochondrial support and has been studied in a placebo-controlled trial. Every batch is lab-tested.

Yes. You can pause, skip a delivery, or cancel anytime from your account. No minimum term, no questions asked.

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

Every batch is lab-tested and the base is a clean olive-leaf formula. The full ingredient list is on the product page.