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Long vs. short workouts: which builds better endurance?

NCT ID NCT07504003

Knowledge-focused Sponsor: Centre Hospitalier Universitaire de Saint Etienne 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 looks at whether longer or shorter training sessions help healthy adults maintain their endurance during a 4-hour cycling test. Researchers will measure changes in power output and heart rate. 40 volunteers who exercise up to 2 hours per week will participate.

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 40 people

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

Started

Apr 2026

Expected to finish

Feb 2029

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 45 years

Sex

Anyone

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: * Subjects who engage in rigorous cardiovascular activity (e.g., endurance sports, team sports, combat sports, etc.) for a maximum of two hours per week * Ability to understand, speak, read, and write French * Affiliated with or beneficiaries of a social security system * Having freely given their written consent after being informed of the purpose, procedure, and potential risks involved Exclusion Criteria: * Subjects with chronic joint conditions (e.g., recurrent sprains, patellar or ligament problems). * Subjects with one or more heart conditions, including ischemic, valvular, arrhythmic, hypertensive, congenital, or hypertrophic heart disease. * Participants under guardianship or conservatorship. * Subjects with chronic or central neurological conditions. * Subjects who report having taken products prohibited by the World Anti-Doping Agency. * Pregnant or breastfeeding women. * Subjects who are unable to understand the purpose and conditions of the study and unable to give their consent. * Persons deprived of their liberty by judicial or administrative decision, persons receiving psychiatric care under Articles L. 3212-1 and L. 3213-1 who are not covered by the provisions of Article L. 1121-8, and persons admitted to a health or social care facility for purposes other than research.

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As listed by the trial registrant

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

Endurance exercise Healthy volunteers

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

  • Service de physiologie clinique et de l'exercice

    RECRUITING

    Saint-Etienne, 42055, France

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