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Can short bursts of exercise beat steady workouts for fat loss?

NCT ID NCT06868862

Knowledge-focused Sponsor: Laboratoire des Adaptations Métaboliques à l'Exercice en conditions Physiologiques et Pathologiques 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Aug 31, 2026 · Last updated Sep 01, 2026 · Updated 1 time

Summary

This trial tests how two different exercise sessions, high-intensity interval exercise (HIIE) and moderate-intensity continuous exercise (MICE), affect the body's fat-burning response in young women with overweight or obesity. Researchers measure oxygen use, fat and carbohydrate burning, and appetite for two hours after each session. The goal is to understand whether the intense, stop-and-start style triggers stronger fat loss signals than a steady moderate workout.

What this could mean

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

Active substance
Two exercise sessions: high-intensity interval exercise (HIIE) and moderate-intensity continuous exercise (MICE)
What this could lead to
If it works, this could help tailor exercise recommendations for weight management in young women with overweight or obesity.
What could go wrong
This is a small, early study with only 15 participants, so results may not apply broadly. It measures short-term responses, not long-term weight loss.

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 15 people

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

Started

Feb 2025

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

20 to 45 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: * women with overwieght or obesity (BMI: 25-35 kg/m²) Exclusion Criteria: * contraceptive use * menopause * irregular menstrual cycle * medical contraindications to intense physical activity, * painful joints, * taking ß-blocker

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Conditions

The condition(s) this trial relates to.

Obesity obesity disorder Overweight

As listed by the trial registrant

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

High intensity interval exercise (HIIE) Overweight and obese adults

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

  • Laboratório de Fisiologia e Metabolismo Aplicados à Educação Física

    RECRUITING

    São Paulo, São Paulo, 475, Brazil

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