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This study will help us as scientists and clinicians understand how effective commonly used cooling protocols in emergency departments are and which of the protocols is the most effective.
It consists of a single, approximately 1 hour preliminary session and five, approximately 3 hour experimental sessions, equaling an approximate 16 hour total time commitment.
The purpose of this research is to test the effectiveness of three cooling protocols.
Additionally, a negative control (passive cooling in air-conditioned room) and a positive control (cold water immersion).
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Passive cooling | Active Comparator | Participant lies supine in an air-conditioned room |
|
| Cooling packs | Experimental | During recovery, cooling packs are applied on either side of the neck, both underarms, and both sides of the groin |
|
| Ice sheets | Experimental | During recovery, participants lie supine and are wrapped in bed sheets that have been soaked in ice water, then have a fan directed towards them while cooling |
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| Body bag full of ice | Experimental | During recovery, participants are zipped into a body bag that is full of ice |
|
| Cold water immersion | Experimental | During recovery, participants are submerged to the neck in a cold water bath |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Passive cooling | Procedure | During recovery, participants lie supine in an air-conditioned room |
|
| Measure | Description | Time Frame |
|---|---|---|
| Rectal temperature cooling rate | Following termination of the exercise protocol, at a core temperature above 39 degrees Celcius, participants will be cooled until they reach a core temperature of 38 degrees Celcius. The cooling rate in degrees Celcius per minute, is the primary outcome. | The measurement occurs immediately upon completion of the exercise protocol. Time itself is part of the outcome variable and will vary between participants (~3 to 40 min post exercise protocol). |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Nathan Morris, PhD | Contact | 719-255-4466 | nmorris6@uccs.edu |
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| University of Colorado Colorado Springs | Recruiting | Colorado Springs | Colorado | 80918 | United States |
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| Type | Includes Protocol | Includes SAP | Includes ICF | Document Label | Document Date | Document Uploaded Date | Document File Name |
|---|---|---|---|---|---|---|---|
| ICF | No | No | Yes | Informed Consent Form | Nov 13, 2025 | Feb 18, 2026 | ICF_000.pdf |
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| ID | Term |
|---|---|
| D000084462 | Hyperthermia |
| D009043 | Motor Activity |
| ID | Term |
|---|---|
| D001832 | Body Temperature Changes |
| D012816 | Signs and Symptoms |
| D013568 | Pathological Conditions, Signs and Symptoms |
| D018882 | Heat Stress Disorders |
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| ID | Term |
|---|---|
| D046448 | Ice Cover |
| ID | Term |
|---|---|
| D055593 | Geological Phenomena |
| D055585 | Physical Phenomena |
| D007053 | Ice |
| D004777 | Environment |
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| Cooling packs | Procedure | During recovery, participants lie supine while ice packs are applied to both sides of the neck, both arm pits, and both sides of the groin |
|
|
| Ice sheets | Procedure | During recovery, participants are wrapped in bed sheets that have been soaked in ice water, while an electric fan blows air across their body |
|
| Body bag cooling | Procedure | During recovery, participants are placed in a body bag full of ice, and then have ice placed on top of their body, followed by zipping the body bag closed. |
|
|
| Cold water immersion | Procedure | During recovery, participants are submerged in a bath, up to their neck, in cold water water with ice |
|
|
| D014947 | Wounds and Injuries |
| D001519 | Behavior |
| D055669 |
| Ecological and Environmental Phenomena |
| D001686 | Biological Phenomena |
| D004778 | Environment and Public Health |