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Triathlon heart strain: study probes hidden risks of Ultra-Endurance racing

NCT ID NCT03972865

Knowledge-focused Sponsor: University Hospital, Montpellier 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 looked at 72 healthy male triathletes aged 20-54 who competed in a long-distance triathlon. Researchers checked heart function and rhythm before, during, and after the race to see if intense exercise causes temporary heart strain or irregular beats. The goal was to better understand the heart risks of extreme endurance sports.

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

72 people

The number who actually took part.

Started

Aug 2019

Finished

Mar 2021

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

20 to 54 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 sex * Age between 20 to 54 years old * Participating in the triathlon of Embrun 2019 * Collection of free and informed consent given verbally and in writing. Exclusion Criteria: * History of heart disease * History of cardiac rhythm disorder. * Subject with 1 or more cardiovascular risk factors (tobacco, diabetes, hypertension, BMI\> 30). * Cardiac, vascular or respiratory treatment(s). * Use of substances on the list of doping products of the French Anti-Doping Agency (https://www.afld.fr/wp-content/uploads/2018/01/Liste-des- prohibitions-2018.pdf) * Subject in relative exclusion period compared to another protocol or for which the annual amount of the maximum indemnities of 4500 € has been reached. * Participation of the subject in another study * Subject not affiliated to a social security scheme, or not a beneficiary of such a scheme. * Pregnant or nursing woman, patient unable to give her protected primary consent, vulnerable persons (art.L.1121-6, L.1121-7, L.1211-8, L.1211-9) * Subject deprived of liberty by judicial or administrative decision

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Conditions

The condition(s) this trial relates to.

cardiac rhythm disease Ventricular Dysfunction, Right

As listed by the trial registrant

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

Right ventricular dysfunction Ventricular arrythmia

Contacts and locations

Locations

  • Arnaud de Villeneuve, CHU

    Montpellier, Hérault, 34090, France

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