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Olive leaf extract may supercharge your workout — a trial puts it to the test

NCT ID NCT07729072

Knowledge-focused Sponsor: University of Lausanne Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting This study
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jul 27, 2026 · Last updated Jul 28, 2026 · Updated 1 time

Summary

This trial investigates whether taking olive leaf extract daily for three weeks can enhance the effects of endurance training in healthy, physically active adults aged 18 to 45. Participants will take either olive leaf extract or a placebo while following a moderate or high-intensity cycling program. Researchers will measure changes in aerobic power, oxygen uptake, and muscle function to see if the supplement improves performance beyond training alone.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
olive leaf extract capsules (250 mg daily)
What this could lead to
If it works, this could point toward a natural supplement that enhances the gains from endurance exercise, improving fitness and muscle health.
What could go wrong
This is an early-stage, small trial in healthy volunteers. The supplement may show no added benefit over training alone, and results may not apply to other populations.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 60 people

The number the study aims to enrol. It can still change while the study runs.

Expected to start

Sep 2026

An estimate. Start dates often move.

Expected to finish

Dec 2029

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 to 45 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: 1. Being between 18 and 45 years old 2. Being healthy (assessed through the PAR-Q questionnaire). 3. Being physically active, but not involved in any structured training program 4. Being available for the study period. Exclusion Criteria: 1. If a participant answers positively to any YES/NO question in the PAR-Q health questionnaire. For questions requiring a precision, any positive answer will be reviewed by a medical doctor, who will determine the inclusion/exclusion of the participant. 2. Having allergy to xylocaine 3. Being pregnant.

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Conditions

The condition(s) this trial relates to.

Motor Activity

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Exercise training Healthy adult participants Neuromuscular adaptations Nutritional intervention

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Bâtiment Synathlon, quartier UNIL-Centre

    Lausanne, 1015, Switzerland

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