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Physiological evaluation of the WBGT index for occupational heat stress.
Ramanathan NL; Belding HS
Am Ind Hyg Assoc J 1973 Sep; 34(9):375-383
Three fit young men were exposed for 2 hours at 2 wet bulb globe temperature levels under 4 different combinations of natural wet bulb, globe temperature, and air speed, at constant air temperature and metabolic work. Relatively higher ambient humidity resulted in higher heart rate, body core temperature, forehead temperature, and sweat loss. Under dry conditions, the strain of exposure at the two temperatures could not be differentiated. Computed heat stress index values and observed Botsford wet globe readings were better indicators of relative strain resulting from exposure than wet bulb globe temperature index.
NIOSH-Publication; NIOSH-Grant; Grants-other; Wet-bulb-thermometers; Temperature-measurement-instrumentation; Heat-stress; Physiology; Cardiovascular-function; Sweat-rate; Body-temperature; Humidity
Occupational Health Univ of Pittsburgh Sch of PH 130 DE Soto Street Pittsburgh, PA 15213
Issue of Publication
Other Occupational Concerns; Grants-other
American Industrial Hygiene Association Journal
University of Pittsburgh, Pittsburgh, Pennsylvania
Page last reviewed: November 20, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division