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Sweat science: athletes tested in scorching heat

NCT ID NCT07307391

Knowledge-focused Sponsor: University of Valladolid 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 how semi-professional athletes' bodies handle heat while walking or jogging in hot, dry versus hot, humid conditions. Six athletes exercised in a climate-controlled room set to 40°C or 31°C with different humidity levels. Researchers measured heart rate, oxygen use, body temperature, and sweat rate to understand how the body cools itself during exercise in the heat.

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

6 people

The number who actually took part.

Started

Jul 2025

Finished

Dec 2025

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 50 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: * Participation at the regional competition level * Receiving monetary remuneration for their sports engagement * Participating in sports activities in the previous six years * Average training experience of 6.0±1.4 years * A weekly volume of 6.3±0.7 days for 2.3±0.7 hours (h)·day-¹. Exclusion Criteria: * A 2 kg weight change in the previous month * Adherence to special diets * Use of nutritional supplements * Smoking * An acute or chronic communicable or noncommunicable disease * Heat allergic problems.

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Conditions

The condition(s) this trial relates to.

Heat Stress Disorders

As listed by the trial registrant

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

Heat acclimation and thermotolerance Heat effect

Contacts and locations

Locations

  • Faculty of Health Sciences, University of Valladolid Soria Campus, Soria, Soria 42004

    Soria, Soria, 42004, Spain

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Other studies related to the condition(s) this trial covers.