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Women Runners' hearts under the microscope in Ultra-Marathon study

NCT ID NCT07372859

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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jun 24, 2026 · Last updated Jun 27, 2026 · Updated 2 times

Summary

This study will follow 120 female runners during ultra-endurance races (69-80 km) to see how their hearts and inflammation levels change. Researchers will use ultrasound scans before, during, and after the race, and link those changes to hormone levels like estrogen and testosterone. The goal is to better understand women's unique heart responses to extreme exercise.

What this could mean

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

What this could lead to
If successful, this could improve understanding of how extreme exercise affects women's hearts and inflammation, guiding future training and health advice.
What could go wrong
This is an observational study with no treatment, so it won't directly change medical practice. Results may not apply to all women or less extreme 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

About 120 people

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

Expected to start

Mar 2026

An estimate. Start dates often move.

Expected to finish

Sep 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 years and older

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: * Must have a Global Positioning System watch during the race; * Must participate in one of the following races: * "Ecotrail de Paris Ile France©" (=a trail running race in the Paris region, it is not possible to translate; it is a registered trademark) 80 kilometers; * Or "la 6000D©" 69 kilometers; * Must comply with the race regulations: * Medical certificate stating no contraindications to competitive running, dated less than 12 months prior to the race; * Or a valid sports license on the day of the race. * Must agree to participate in the study, sign the consent form, and allow the sponsor to use their data for the purposes of this study. Exclusion Criteria: * Refusal or linguistic or mental incapacity to sign the informed consent form; * Person under guardianship (conservatorship, curators, or legal protection) or deprived of liberty; * Person not affiliated with a social security scheme; * Pregnant woman; * Person participating in a drug study; * Women with a medical history (chronic lung disease, heart disease, pharmacologically treated hypertension) or with a known significant chronic inflammatory disease at the time of the enrollment visit; * Person who has already participated in this study in a previous race.

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As listed by the trial registrant

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

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

  • Hôpital Henri Mondor, APHP

    Créteil, France

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