Physiological adaptation of women to heat stress.
NIOSH 1982 Oct; :1-75
Three studies were conducted to investigate age related changes in thermoregulation observed in previous heat stress studies. Sweating threshold and capacity under thermal stress were studied in ten postmenopausal women and ten younger women. Age effects on responses to exercise under thermal stress were studied in nine postmenopausal women and seven younger women. The effect of endurance training on regional and whole body sweating response was studied in nine women who trained for distance races and nine active but nonrunning women who were matched for age and body surface. The results of the study indicate that not all regional sites to which the sweat capsules were attached reflected the sweating response of the body as a whole. This would indicate that the selection of the site to be monitored for sweating is an important variable in the process. Women runners in this study had twice the sweat rate gain per degree rise in rectal temperature (Tre), than nonrunning subjects, but no difference was noted in the Tre threshold for the onset of sweating. When whole body sweat was used to illustrate the difference in sweating response of the running and nonrunning groups, there was no difference in slope but a marked difference in Tre threshold. The authors conclude that the results of all three studies indicate that healthy older individuals who remain physically active are less likely to have adverse reactions to heat stress than their sedentary counterparts.
NIOSH-Grant; Heat-tolerance; Physical-exercise; Physiological-response; Heat-exposure; Age-factors
None University of California Inst of Environmental Stress Santa Barbara, Calif 93106
Final Grant Report
NTIS Accession No.
Terminal Progress Report, NIOSH Grant No. R01-OH-00896, 75 pages, 36 references
University of California Santa Barbara, Santa Barbara, California