Swiss endurance science

Delay the burn.
Finish all three strong.

Get the Pre-Activity shot

OLEUS Pre-Activity helps you hold energy and power across swim, bike and run. Taken before you start, it keeps you going for longer.

The science
4.87 · 675 reviews
“The legs were there when it mattered most.”Sophie “The effort that used to crack me late on the bike stayed steady into the run.”Luca “First triathlon, and I stayed strong right to the finish.”Thomas “The final run did not fall apart. I finished strong.”Nina “No gel sitting heavy. My stomach stays calm through the whole race.”Anna “Now I hold my effort across sessions and keep showing up.”Emma
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Pre-Activity shot

Endurance in one 60ml shot.

A Swiss formula built for long efforts, hard bricks and race day, taken before you swim, bike and run.

  • Hold your pace across swim, bike and run
  • Support working muscles through long efforts
  • Stay sharp and energised to the finish
€29,90
  • Ships within 24 hours
  • 30-day money-back guarantee
When do I take the Pre-Activity Shot?

One 60ml shot about an hour before a long session, hard brick or race, when you want energy and power on tap. On race day, take it before the start. Limit to one shot per day. Shake well and drink cold.

How often should I take it?

On your key days: before long sessions, hard bricks or race day. One shot per day is plenty, and the effect is there the moment you need it.

Can I pause or cancel my subscription?

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

The problem

Fuel gets you started. Energy production carries you through all three.

Swim, bike and run each demand more from your energy system. As fatigue builds, power drops, your pace gets harder to hold, and the run off the bike costs more with every kilometre.

  1. Fatigue sets in

    Your legs grow heavier, your effort climbs, and the pace that felt easy on the bike becomes a fight to hold into the run.

  2. Power starts to fade

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

  3. Fuel alone is not enough

    Gels hand you carbohydrate, but your cells still have to turn that fuel into usable energy to keep you moving across three disciplines.

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How it works

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

Prime

Swim, bike and run all demand more from your energy system. Oleuropein helps activate the mitochondria, so your body is ready to turn fuel into usable energy before you start.

Power

When the effort climbs across three disciplines, output starts to drop. Caffeine from guarana helps you stay sharp, hold your pace and keep pushing for longer.

Perform

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

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Trusted by 10,000+ endurance athletes.

Excellent 4.87 based on 675 reviews
Sophie Laurent

Pre-Activity Shot

I used to fade halfway through the run. Taken about an hour before the start, I finally held my plan across swim, bike and run, and the legs were there when it mattered most.

Lyon, France, 2 months ago

Luca Bianchi

Pre-Activity Shot

Taken about an hour before race start, the effort that used to crack me late on the bike stayed steady all the way into the run.

Bologna, Italy, 3 months ago

Thomas Vermeer

Pre-Activity Shot

A friend told me to just try it once. I signed up for my first triathlon nervous about the run off the bike, took it before the start, and stayed strong right to the finish.

Utrecht, Netherlands, 1 month ago

Nina Andersen

Pre-Activity Shot

First long race where the final run did not fall apart. I take it before the start and finish strong instead of just trying to hold on.

Aarhus, Denmark, 2 months ago

Anna Müller

Pre-Activity Shot

No sugar, nothing sitting heavy. I take it before the start and my stomach stays calm through the whole race.

Freiburg, Germany, 4 months ago

Emma Collins

Pre-Activity Shot

The big training weeks used to leave me wrecked. Taken before my key sessions, I hold my effort across swim, bike and run and keep showing up.

Bristol, England, 1 month ago

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 another gel. Endurance at the cellular level.

OLEUS Pre-Activity works inside the mitochondria, the organelles that turn fuel, oxygen and nutrients into usable energy. Prime that engine before you start and you hold power for longer, with no sugar spike and no gel to swallow mid-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 turn those inputs into usable energy.

  3. Cellular energy

    ATP is released as steady, lasting energy. No stimulant spike, no crash.

The subscription

More than a subscription.

Your Pre-Activity protocol arrives before you run out.

  • Save 15% on every delivery
  • Free shipping
  • Pause, skip or cancel anytime
Get the Pre-Activity shot
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Frequently asked questions

Take one 60ml shot about one hour before a long session, hard brick or race. On race day, take it before the start. Limit to one shot per day.

No. A gel gives you carbohydrate during the effort. Pre-Activity is taken before you start and supports how your body turns fuel into usable energy, so it works alongside your gels across swim, bike and run 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 swim. It contains no ingredients designed to be taken mid-effort.

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.

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