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Heat strain: biophysical and physiological evaluation.

Authors
Gonzalez-RR
Source
John B. Pierce Foundation Laboratory, New Haven, Connecticut, Terminal Progress Report, 1981 Jan; :1-7
Link
NIOSHTIC No.
00181006
Abstract
The degree of thermal strain attributable to changes in environmental stress were assessed as they relate to the success or failure of various thermoregulatory mechanisms in the body. Various experimental studies were briefly cited. It has been possible on a psychrometric chart to describe loci of constant effective temperatures, skin wettedness, mean skin and body temperatures, skin evaporation as well as to categorize sensations of discomfort and temperature that would be expected after 1 hour exposure for a sedentary subject when normally clothed in still air. General relationships for sedentary clothed subjects also apply to exercising subjects, but with certain quantitative differences. It has also been possible to measure the local skin humidity characteristics with newly developed miniature automatic dew point sensors. Another study examined an experimental model applicable to clothing and tents used under such conditions. Other research evaluated a two node thermoregulatory model for predicting sensory responses while working in the heat. Cardiorespiratory and thermoregulatory responses were also investigated using both trained and untrained subjects under various conditions. The findings from these various studies suggest that a physically fit individual is more heat tolerant, persons aged 18 to 47 years are more heat tolerant, and the fabric called Gortex may prove successful in combating clothing enhanced heat stress. A standardized heat stress scale for gauging age related endurance levels was developed.
Keywords
NIOSH-Grant; Hot-environments; Heat-stress; Heat-tolerance; Heat-exposure; Heat-exhaustion; Climatic-effects; Physiological-response; Age-factors; Workplace-studies
Contact
None John B Pierce Fdn Laboratory 290 Congress Avenue New Haven, Conn 06519
Publication Date
19810101
Document Type
Final Grant Report
Funding Amount
161724
Funding Type
Grant
Fiscal Year
1981
NTIS Accession No.
PB88-247762
NTIS Price
A02
Identifying No.
Grant-Number-R01-OH-00836
NIOSH Division
OEP
Source Name
John B. Pierce Foundation Laboratory, New Haven, Connecticut, Terminal Progress Report
State
CT
Performing Organization
John B. Pierce Foundation Lab, Inc., New Haven, Connecticut
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