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Gut check: can probiotics soothe Athletes' stomachs during hard training?

NCT ID NCT07252778

Symptom relief Sponsor: Krzysztof Durkalec-Michalski Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 tests whether a 2-week course of a multi-strain probiotic supplement can reduce stomach and gut issues that elite female rowers often experience during intense exercise. Thirty athletes from the Polish national team will take either the probiotic or a placebo, and researchers will measure gut health markers in blood and stool. The goal is to see if probiotics can help athletes train harder with less digestive discomfort.

What this could mean

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

Active substance
multi-strain probiotic supplement (SANPROBI® Barrier)
What this could lead to
If it works, this could point toward a simple way for athletes to reduce stomach discomfort during intense training.
What could go wrong
This is a small, early-stage trial with only 30 participants, so results may not apply to all athletes. The effect may be small or not noticeable.

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

Phase 2/3

Runs two stages together: whether the treatment works, then large-scale confirmation.

Participants

About 30 people

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

Expected to start

Nov 2025

An estimate. Start dates often move.

Expected to finish

Jun 2027

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

16 to 50 years

Sex

Female 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: * belonging to the national rowing team; * training experience ≥5 years; * a currently issued medical certificate confirming * good health and capacity to practice sports; * good health without chronic health disorders; * written informed consent to participate. Exclusion Criteria: * injury, any health contraindication or failure to perform exercise procedures; * gastrointestinal infections, diseases, disorders; * past history of gastrointestinal surgery, and * other self-reported gastrointestinal issues; * reporting symptoms of infection or taking any medication (e.g. antibiotics) for 4 weeks before the study protocol; * current supplementation of prebiotics, * probiotics, synbiotics (last 4 weeks); * current intake of pharmaceutical agents (e.g., nonsteroidal anti-inflammatory drugs, laxatives, antidiarrhea agents, antacids, and/or antiemetics) (last 4 weeks); * failure to follow the study protocol; * declared general feeling of being unwell; * pregnancy or current pregnancy planning.

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As listed by the trial registrant

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

Aerobic capacity Biochemical markers Exercise performance Sports nutrition Supplementation

How to take part

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  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

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Contacts and locations

Locations

  • Department of Sports Dietetics, Poznan University of Physical Education Poznań

    RECRUITING

    Poznan, Wielkopolska, 61-871, Poland

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