Physiological evaluation of industrial heat stress.
Minard-D; Goldsmith-R; Farrier-PH Jr.; Lambiotte-BJ Jr.
Am Ind Hyg Assoc J 1971 Jan; 32(1):17-28
Industrial heat stress survey conducted at an open hearth department of a Pittsburgh steel mill. Evaluation of heart rate (HR) and body temperature in 19 workers on various jobs reveals that men expend 31 to 36 percent of maximum cardiocirculatory capacity on the job. In 12 tests on five second helpers, continuous electrocardiographic recordings show that individual mean HR for the shift ranges from 99 to 136 per minute in summer and 97 to 111 per minute in winter. HR on the job varies inversely with individual work capacity estimated from per shift performance with an ergometer. Performance decrement is observed post shift in two workers with lowest work capacity. HR gradients to heat levels are nearly as great as to task levels in summer. In winter, HR gradient to heat is only 33 percent that of summer, but HR responses to task are unchanged.
NIOSH-Publication; NIOSH-Grant; Physiological-studies; Physiological-response; Cardiovascular-function; Heat-stress; Physiological-stress; Heat; Industrial-processes; Seasonal-factors
Occupational Health University of Pittsburgh 130 Desoto Street Pittsburgh, PA 15213
American Industrial Hygiene Association Journal
University of Pittsburgh, Pittsburgh, Pennsylvania