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Could a breath of hydrogen boost your workout? small study investigates

NCT ID NCT07644000

Knowledge-focused Sponsor: Palacky University 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 is testing whether inhaling a gas mixture containing molecular hydrogen for an hour each day for a week can alter how the body uses energy during exercise. Twenty-two healthy women aged 18-30 will undergo exercise tests after inhaling either hydrogen or plain air (as a placebo), with a two-week break in between. The main focus is on measuring breathing and gas exchange to see if hydrogen reduces the body's metabolic response to exercise.

What this could mean

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

Active substance
Molecular hydrogen (3.75% hydrogen gas mixed with ambient air, inhaled)
What this could lead to
If it works, this could point toward a way to reduce metabolic strain during exercise, possibly benefiting athletes or people with metabolic conditions.
What could go wrong
This is a very small, early-stage trial in healthy women only. It is not designed to treat any disease, and results may not apply to other groups or real-world settings.

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 22 people

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

Started

Jun 2026

Expected to finish

Dec 2026

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 30 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: * Healthy female participants. * Regular menstrual cycle with exercise testing scheduled outside the menstrual phase. * Signed informed consent. Exclusion Criteria: * Pregnancy or breastfeeding. * History or presence of cardiovascular disease. * History or presence of respiratory disease. * Regular use of medications affecting metabolism. * Use of dietary supplements affecting metabolism within 14 days prior to intervention. * Strenuous physical activity within 24 hours prior to exercise testing. * Any contraindication to exercise testing or study participation determined by a physician.

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As listed by the trial registrant

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

Healthy adult females

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

  • Palacky University, Faculty of Physical Culture

    RECRUITING

    Olomouc, 77111, Czechia

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