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Olive leaf extract: a natural boost for athlete recovery?

NCT ID NCT07371052

Symptom relief Sponsor: Karabuk University 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
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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study tested whether taking olive leaf extract for four weeks could improve physical performance, reduce muscle soreness, and enhance sleep quality in 18 elite male handball players. Participants received either a daily 500 mg olive leaf supplement or a placebo. The goal was to see if this natural supplement could help athletes recover faster after intense exercise.

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

18 people

The number who actually took part.

Started

Jan 2025

Finished

Feb 2025

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 25 years

Sex

Male participants only

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

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: * Male elite handball players aged 18 years or older * Free from any diagnosed chronic disease, as determined by medical history * Not following a calorie-restricted diet within the previous six months * No use of nutritional supplements within the previous six months Exclusion Criteria: * Age under 18 years * Smoking or alcohol consumption * Presence of any diagnosed chronic disease * Adherence to a regular calorie-restricted diet within the previous six months * Use of nutritional supplements during the previous six months

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As listed by the trial registrant

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

Handball players

Contacts and locations

Locations

  • Karabuk University

    Karabük, Central, 78050, Turkey (Türkiye)

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