The Effect of Simulated Burn Injury on Post Exercise Recovery in Hot Environments (HSR)

The University of Texas System (UT)

Status: Enrolling

Conditions: Body Temperature Regulation; Cardiovascular Physiology; Burn Injury

Treatments: Other: Simulated burn injury via application of absorbent and impermeable material over 60% of the body

Study type: Interventional

Funder types: Other; NIH

Identifiers

NCT07050264

STU20251344

R35GM152112-01 (U.S. NIH Grant/Contract)

Details and patient eligibility

About

Burn survivors have difficulty thermoregulating due to reduced skin blood flow and sweating responses at the grafted sites. It has been previously shown that this impaired heat dissipation results in burn survivors experiencing higher core temperatures for a given exercise/environmental exposure compared to non-burned individuals. This also holds true with the use of simulated burn injury. When an absorbent material is applied to the skin over a desired amount of body surface area, it replicates a burn injury of the same size (i.e., simulated burn injury). A question that remains unknown is if this impaired thermoregulation in burn survivors would affect post-exercise core temperature recovery, i.e., do burn survivors recover slower than non-burned individuals upon stopping exercise. To that end, the primary objective of this project is to determine the rate at which body temperature and other markers of thermoregulation recover after a bout of exercise in the heat and if this response is different in the same individual with and without simulated burn injury.

Enrollment: 28 estimated patients

Sex: All

Ages: 18 to 65 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• 18 and 65 years of age
• free of any significant underlying medical problems based upon a detailed medical history and physical exam, and normal resting electrocardiogram.

Exclusion criteria

• Known heart disease
• other chronic medical conditions requiring regular medical therapy including cancer, diabetes, neurological diseases, and uncontrolled hypertension, etc. as well as serious abnormalities detected on routine screening.
• Individuals who are pregnant, planning to become pregnant, or breastfeeding will be excluded, this will be confirmed in females using a urine pregnancy test.
• Taking prescribed medications (such as beta blockers and non-dihydropyridine calcium channel blockers) or over-the-counter medications that have known influences on thermoregulatory response.
• Current smokers, as well as individuals who regularly smoked within the past 3 years.
• body mass index is ≥ 31 kg/m2.

Trial design

Primary purpose: Basic Science

Allocation: Randomized

Interventional model: Crossover Assignment

Masking: None (Open label)

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28 participants in 4 patient groups

Hot and Humid with simulated burns

Experimental group

Description:

Individuals will be exposed to hot and humid conditions with a simulated burn injury.

Treatment:

Other: Simulated burn injury via application of absorbent and impermeable material over 60% of the body

Hot and Humid without simulated burns

No Intervention group

Description:

Individuals will be exposed to hot and humid conditions without a simulated burn injury.

Hot and Dry with simulated burns

Experimental group

Description:

Individuals will be exposed to hot and dry conditions with a simulated burn injury.

Treatment:

Other: Simulated burn injury via application of absorbent and impermeable material over 60% of the body

Hot and Dry without simulated burns

No Intervention group

Description:

Individuals will be exposed to hot and dry conditions without a simulated burn injury.