Microclimate Cooling Effect on Perceived Exertion in Four Heat/Exercise Scenarios
NAVAL HEALTH RESEARCH CENTER SAN DIEGO CA
Pagination or Media Count:
Operation Desert Storm demonstrated a need for individual microclimate cooling during strenuous activity. Evaluation of a cooling system should not only consider physiological functions but subjective measures of comfort, such as ratings of perceived exertion RPE. The objectives of this study were evaluate a cooling suits effect on a subjective RPE, b heart rate HR, and c the magnitude of the correlation between RPE and HR. Thirty- one U.S. Marine Corps subjects, wearing chemical defense ensemble, were tested in four separate scenarios of heatexercise combinations during both cooling suit and control sessions. Results of repeated measures multivariate analysis of variance showed that RPE was significantly lowered by wearing a cooling suit during only the most strenuous of the four scenarios. A decrease in the magnitude of the correlation between RPE and HR during all four cooling suit sessions indicated that a microclimate cooling suit interfered with perception of exertion.
- Stress Physiology
- Human Factors Engineering and Man Machine Systems