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Determinants of the prescriptive zone of industrial workers.

Authors
Kuhlemeier-KV; Miller-JM; Dobos-FN; Jensen-R
Source
J Appl Physiol: Respir Environ Exercise Physiol 1977 Aug; 43(2):347-351
NIOSHTIC No.
00073167
Abstract
The prescriptive zone is the range of climates in which man's body temperature is independent of climatic conditions. The environmental temperatures which define the upper limit of the prescriptive zone (ULPZ) at different work rates were determined in 46 clothed, healthy, male industrial workers; some of the men were job acclimated to heat and some were not. They performed a total of 653 work bouts of low, medium, or high intensity in environments ranging from 11 to 35 degrees centigrade corrected effective temperature (CET) (8-37 degrees centigrade wet bulb globe temperature). Heart rates (HR) and rectal temperatures (Tre) were measured after 1 hour of work. The ULPZ was calculated from Tre data. HR's showed a similar pattern of response as Tre except that the inflection point corresponding to the ULPZ occurred at different environmental temperatures at most of the experiment conditions. About one third of the work bouts were performed in the summer months and the remainder in the winter. The ULPZ decreased with increasing work rates. At high, but not low, work rates, men who were exposed to heat in the performance of their jobs were more heat tolerant than men who were not heat acclimatized. Both groups were found to be more heat tolerant in the summer months than in the winter. (Contract No. 099-72-0045)
Keywords
NIOSH-Contract; Contract-099-72-0045; Heat-tolerance; Body-temperature; Cardiovascular-system; Physiological-effects; Acclimatization; Workloads; Season; Climate; Environment; Author Keywords: body temperature; pulse rate; heat stress; exercise; acclimatization; work
CODEN
JARPDU
Publication Date
19770801
Document Type
Journal Article
Funding Type
Contract
Fiscal Year
1977
NTIS Accession No.
NTIS Price
Identifying No.
Contract-099-72-0045
Issue of Publication
2
ISSN
0161-7567
NIOSH Division
DBBS
Source Name
Journal of Applied Physiology: Respiratory, Environmental and Exercise Physiology
State
AL; OH
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