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Physiological adaptation of women to heat stress.

Authors
Drinkwater-BL; Horvath-SM
Source
NIOSH 1982 Oct; :1-75
Link
NIOSHTIC No.
00179865
Abstract
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.
Keywords
NIOSH-Grant; Heat-tolerance; Physical-exercise; Physiological-response; Heat-exposure; Age-factors
Contact
None University of California Inst of Environmental Stress Santa Barbara, Calif 93106
Publication Date
19821030
Document Type
Final Grant Report
Funding Amount
206329
Funding Type
Grant
Fiscal Year
1983
NTIS Accession No.
PB88-221163
NTIS Price
A05
Identifying No.
Grant-Number-R01-OH-00896
NIOSH Division
OEP
Source Name
Terminal Progress Report, NIOSH Grant No. R01-OH-00896, 75 pages, 36 references
State
CA
Performing Organization
University of California Santa Barbara, Santa Barbara, California
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