Reproducibility of Onset and Sensitivity of Sweating during Exercise at Thermoneutrality,
Abstract
The reproducibility of a test of thermoregulatory function was examined. Active male volunteers cycled at 70% VO2 max at 25C, 20% relative humidity. Chest sweat rate (MSW), measured by resistance hygrometry, and Tes were recorded. By plotting MSW as a linear function of Tes, Tes for onset of sweating (onset) and increase of MSW per C rise of Tes (sensitivity) were ascertained. Tests were performed daily at the same time on 3 consecutive days (n = 6); at 0800, 1000, 1200, 1400 and 1600 hours on 5 different days (n = 5); and at 0800, 1030, 1300 and 1530 hours on the same day (n = 5). Repeated measures analysis of variance for each experimental protocol revealed no statistically significant differences for onset or sensitivity. Test-retest coefficients of correlation for both onset and sensitivity comparing any 2 test days or any 2 test times were in excess of 0.90 and 0.85, respectively. It is concluded that results form this test are reproducible from day to day and are relatively insensitive to time of administration (within the limits 0800 to 1600 hours). Moreover, prior testing on the same day does not influence results obtained from testing later in the day.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 26, 1979
- Accession Number
- ADA074976
Entities
People
- Donald Horstman
- Omar Hottenstein
Organizations
- United States Army Research Institute of Environmental Medicine