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Chilly workout secrets: study probes sex differences in fat burning

NCT ID NCT07297823

Knowledge-focused Sponsor: Colorado State 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 24, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This pilot study from Colorado State University will test 20 healthy adults (ages 18-40) to see if cold temperatures change how the body burns fat during exercise, and whether that change differs between females and males. Participants will exercise in both a normal room and a very cold room (5°C). The study is purely observational and aims to gather basic knowledge, not to treat any condition.

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 study could point toward personalized exercise or cold-exposure strategies for weight management based on sex.
What could go wrong
This is a very small pilot study (20 people) with no treatment or health outcome. Results may not apply to older or less healthy people, and the effect may be too small to matter.

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 20 people

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

Started

Apr 2026

Expected to finish

Jun 2027

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 40 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: * Age 18-40 years (inclusive) * Weight stable (no change in body mass greater than 5 lbs. within the previous 6 months. * Willing to abstain from caffeine and alcohol for 24-hours prior to two different study visits * Competency in English as informally assessed by comprehension of the Informed Consent. This study involves maximal exercise testing; for safety reasons, the ability for clear and rapid communication will be necessary between the research participants and the investigators. * Regular exercise (i.e., at least 150 minutes of moderate-vigorous exercise per week) Exclusion Criteria: * Use of hormonal contraceptives * History of autonomic, cardio-pulmonary, and/or metabolic disease (including heart failure, hypertension, arrhythmia, vascular disease, and/or diabetes) * Pregnancy or breast feeding * Habitual use of tobacco/nicotine products or recreational drugs (2 or more uses within the previous month)

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Conditions

The condition(s) this trial relates to.

common cold Motor Activity platelet-type bleeding disorder 10

As listed by the trial registrant

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

Exercise

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

  • Colorado State University

    RECRUITING

    Fort Collins, Colorado, 80523, United States

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