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Blackcurrant extract may power up volleyball players

NCT ID NCT07753395

Disease control Sponsor: China Medical University Hospital 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Aug 07, 2026 · Last updated Aug 07, 2026

Summary

This trial tests whether taking New Zealand blackcurrant extract for seven days can improve athletic performance and reduce physical stress in young, healthy male volleyball players. Participants will be randomly assigned to receive either the blackcurrant supplement or a placebo, then engage in simulated volleyball matches. Researchers will measure grip strength, jump height, agility, and blood markers of muscle damage and inflammation to see if the supplement offers any benefits.

What this could mean

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

Active substance
New Zealand blackcurrant extract (35% anthocyanin) as a dietary supplement
What this could lead to
If effective, this supplement could help athletes recover faster and perform better during intense sports.
What could go wrong
This is a small, early-stage trial with only 16 participants, so results may not apply broadly. The supplement's effects on performance and recovery are not yet proven.

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

16 people

The number who actually took part.

Started

Apr 2025

Finished

Oct 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 30 years

Sex

Male participants only

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: * Male subjects aged 18-30 who regularly practice volleyball and are willing to participate in the experiment. Exclusion Criteria: * Smoking and alcohol consumption. * Patients with diabetes, heart disease, respiratory disease, coagulation disorders, hematomas, or other medical conditions. * Feeling unwell for other reasons during the study period. * Taking any health supplements or medications within the past two months. A medical history questionnaire was completed to exclude any medical conditions, such as recent muscle, bone, tendon, or ligament injuries, or those with a fear of blood draws.

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As listed by the trial registrant

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

Athletic performance

Contacts and locations

Locations

  • China Medical University

    Taichung, 404332, Taiwan

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