Thermodynamic Exposure and Sleep in Military Cadets

NCT ID: NCT07201935

Last Updated: 2025-11-18

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

NOT_YET_RECRUITING

Clinical Phase

NA

Total Enrollment

45 participants

Study Classification

INTERVENTIONAL

Study Start Date

2026-02-28

Study Completion Date

2026-10-31

Brief Summary

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This pilot study investigates the effects of cold-water immersion, traditional sauna use, and their combination on sleep architecture, glymphatic clearance, and psycho-affective health in military cadets. The study uses wearable technologies including the Oura Ring and the Applied Cognition Glymphatic Monitor to collect objective sleep and physiological data.

Detailed Description

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The study will enroll 45 military cadets from The Citadel Military College, randomized into three groups: Cold-Water Immersion (CWI), High Heat Sauna (HHS), and Combined (COM). Participants will undergo a 7-day baseline period followed by a 14-day intervention. Sleep architecture, glymphatic function, and psycho-affective health will be assessed using validated wearable devices and questionnaires. The study aims to identify intervention-specific improvements in sleep and glymphatic clearance.

Conditions

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Cold-water Immersion High Heat Sauna Combination of Cold-water Immersion and High Heat Sauna

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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Cold-water immersion

5 minutes of cold-water immersion (submerged up to chin) at 8 - 10C°(46.4 - 50F°) in the morning between 6:00 - 8:00am.

Group Type EXPERIMENTAL

Cold Water Immersion

Intervention Type BEHAVIORAL

Participants will complete 14 daily sessions of cold-water immersion exposure.

High heat sauna

20 minutes of high heat sauna at 90 - 94C° (190 - 201.2F°) between 5:00 - 7:00pm

Group Type EXPERIMENTAL

High Heat Sauna

Intervention Type BEHAVIORAL

Participants will complete 14 evening sessions in the high heat sauna

Combination

5 minutes of cold-water immersion (submerged up to chin) at 8 - 10C°(46.4 - 50F°) in the morning between 6:00 - 8:00am and 20 minutes of high heat sauna at 90 - 94C° (190 - 201.2F°) between 5:00 - 7:00pm

Group Type EXPERIMENTAL

Cold Water Immersion

Intervention Type BEHAVIORAL

Participants will complete 14 daily sessions of cold-water immersion exposure.

High Heat Sauna

Intervention Type BEHAVIORAL

Participants will complete 14 evening sessions in the high heat sauna

Interventions

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Cold Water Immersion

Participants will complete 14 daily sessions of cold-water immersion exposure.

Intervention Type BEHAVIORAL

High Heat Sauna

Participants will complete 14 evening sessions in the high heat sauna

Intervention Type BEHAVIORAL

Eligibility Criteria

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Inclusion Criteria

* 18 - 30 years of age
* Member of the Ranger Challenge group at The Citadel.
* 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

Exclusion Criteria

* Medical contraindications to continuous wearing of the Oura Ring.
* Current diagnosis of neurological, cardiovascular, and/or sleep disorder.
Minimum Eligible Age

18 Years

Maximum Eligible Age

30 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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Medical University of South Carolina

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Mark Rosenberg, MD

Role: PRINCIPAL_INVESTIGATOR

Medical University of South Carolina

Locations

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The Citadel Military College

Charleston, South Carolina, United States

Site Status

Countries

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United States

Facility Contacts

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Geoffery Mcleod, DO

Role: primary

843-953-4827

Other Identifiers

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Pro00147353

Identifier Type: -

Identifier Source: org_study_id

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