Influence of Wet Clothing on Thermal Protection

Status unconfirmed · Not applicable

Conditions studied: Low Body Temperatures

In brief

The aim of this investigation is to provide guidance for assessing the influence of wet clothing, and its drying time, on body temperature responses during cold air exposure. Twelve healthy and fit adults (men and women aged 18-49) will complete this study. Four cold air exposures (41°F, 180 min) will be randomly conducted, each while wearing a different clothing ensemble that has been saturated by water. During each cold air exposure, you will be asked to rest for 60 min and perform weighted (38.5lbs) treadmill walking for up to 120 min.

Key facts

Study ID

NCT05409937

Run by

United States Army Research Institute of Environmental Medicine

People needed

30

Starts

2021-09-02

Expected to finish

2023-09-30

Last updated by the study team

2023-01-27

Who can join

Age: 18 and older, up to 49. Sex: any. Healthy volunteers: accepted.

You may qualify if…

• Military or civilian, male or female, between the ages of 18 (17 if active duty military) and 49 years.
• Able to carry a rucksack weighing 35 kg (77lbs) for at least 20 minutes and able to carry a rucksack weighing 17.5kg (38.5lbs) for up to 120 minutes
• In good health as determined by our OMSO (Office of Medical Support and Oversight) General Medical Clearance.
• Vaccinated against COVID 19.
• Willing to refrain from heavy exercise and alcoholic beverages for 24 hours before each testing session.
• Willing to refrain from smoking or tobacco use for 8 hours before each testing session.
• Willing to refrain from caffeine ingestion for 12 hours before each testing session.
• Body fat percentage <18% for males, < 24% for females, once 6 individuals of higher body fat (18% or greater for males, 24% or greater for females) have completed the study.

You may not qualify if…

• History of cold injuries.
• Raynaud's syndrome.
• Cold-induced asthma/bronchospasm.
• Medications or dietary supplements that could alter cardiovascular, thermoregulatory, or vascular control.
• Heart, lung, kidney, muscle, or nerve disorder(s).
• Planned MRI during or within two days after completing the study.
• Known allergy to adhesives.
• Female and pregnant, planning to become pregnant, or breastfeeding.

Where it is running

• USARIEM — Natick, Massachusetts, United States (enrolling)

Full record on ClinicalTrials.gov

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