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Ice baths and saunas: the surprising sleep hack for cadets?

NCT ID NCT07201935

Symptom relief Sponsor: Medical University of South Carolina 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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Sep 02, 2026 · Updated 3 times

Summary

This pilot study tests whether cold-water immersion, sauna use, or a combination of both can improve sleep quality in 45 military cadets. Participants will do 14 daily sessions of one of the therapies while wearing an Oura Ring to track sleep. The goal is to see if these temperature-based treatments can boost sleep efficiency and mood.

What this could mean

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

Active substance
cold-water immersion and high heat sauna
What this could lead to
If it works, this could point toward simple, drug-free ways to improve sleep quality using temperature exposure.
What could go wrong
This is a very small pilot study (45 people) with no control group, so results may not be reliable or apply to others. It only tests short-term effects.

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 45 people

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

Expected to start

Oct 2026

An estimate. Start dates often move.

Expected to finish

May 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 30 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.

1. Inclusion Criteria * 18 - 30 years of age * Enrolled military cadet at the Citadel Military College. * Access to a smartphone with access to appropriate app marketplace (Apple iOS 15, Android 8.0 or newer) and reliable data access. * Ability to access and operate Oura Ring application. 2. Exclusion Criteria * Medical contraindications to continuous wearing of the Oura Ring. * Current diagnosis of neurological conditions that impact vascular blood flow or the individual's ability to regulate temperature. * History of cardio-vascular conditions or history of poor blood circulation. * History of heat stroke or known sensitivity to hot/cold environments. * Currently taking medications that impair fluid balance, thermoregulation, blood flow, respiration, or heart rate. * Known dermatological disease aggravated by changes in temperature. * Pregnant or trying to become pregnant within the study timeframe. Urine samples will be provided by interested female cadets to ensure they are not pregnant.

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Conditions

The condition(s) this trial relates to.

insomnia

As listed by the trial registrant

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

Cold-water immersion Combination of cold-water immersion and high heat sauna High heat sauna

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

  • The Citadel Military College

    Charleston, South Carolina, 29404, United States

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