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Sauna weight loss may harm Athletes' sleep and brain function

NCT ID NCT07118904

Knowledge-focused Sponsor: Abant Izzet Baysal University Source: ClinicalTrials.gov ↗

What the study statuses mean

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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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 26, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study looks at how quickly losing weight through dehydration (using a sauna) affects combat athletes' sleep quality, thinking skills, and leg strength. Twelve athletes with prior weight-cutting experience will be monitored before and after losing 3% of their body weight. The goal is to understand the risks of this common practice and help develop safer weight management guidelines.

What this could mean

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

Active substance
Rapid weight loss through dehydration (sauna sessions)
What this could lead to
If successful, this study could provide evidence to make weight-cutting safer for combat athletes and inform changes to weigh-in rules.
What could go wrong
This is a very small study (12 people) and only looks at short-term effects. Results may not apply to all athletes or longer-term health risks.

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 12 people

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

Started

Aug 2025

Expected to finish

Aug 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

17 to 28 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: * Voluntary participation * Being combat athletes with prior rapid weight loss experience * No existing health conditions * No orthopedic injuries Exclusion Criteria: * Using of sleep-related medications * Complications During the Intervention: Participants who experience any complications during experimental intervention.

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Conditions

The condition(s) this trial relates to.

Dehydration insomnia sleep disorder Weight Cycling Weight Loss

As listed by the trial registrant

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

Dehydration Sleep Weight cycling Weight loss

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

  • Bolu Abant İzzet Baysal University, Faculty of Sport Sciences,

    RECRUITING

    Bolu, 14030, Turkey (Türkiye)

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