MAXIMAL SWEATING AND SWEATING EFFICIENCY OF ACCLIMATED MEN AND WOMEN DURING WORK IN THE HEAT escrito por SOTO, KAREN I., Ph.D., The Pennsylvania State University, 1982, 115 páginas; AAT 8228940

Resumen

Four men and four women were heat acclimated and then tested in order to compare the sweating efficiency ((eta) (,s)), their maximal sweating for work in the heat, and the effects of water spraying (WST) on work in extreme, dry- hot environments. The exposures involved a maximal sweating test, two spraying tests, and six sweating efficiency tests. The sweating efficiency tests were done at target skin wettedness (w) of 0.7, 0.8, and 1.0 for both a fully clothed condition and a seminude condition. Sweating efficiency was judged by the rate of evaporated sweat to total sweat rate. Measurements of physiological responses included heart rate (HR), rectal temperature (T(,re)), mean skin temperature (T(,sk)),(' )and total body sweat rate(' )(M(,sw)).

The mean maximal sweat rate of the men and the women were not significantly different. Two of the men were trained individuals and their maximal M(,sw)(' )was greater than the observed values for the sedentary men and all the women. Two trained women had similar maximal M(,sw)(' )as the two sedentary men. It was concluded that trained men have larger maximal M(,sw)(' )than trained women and sedentary men.

In the water spraying tests (WS), the rate of rise of T(,re) and HRwas significatly slower in the WS versus the control test (WC). Theendurance time in the heat was longer in the WS, and five out ofeight subjects reached a steady state in T(,re). It was concluded that work in very hot-dry environments is limited by inadequate sweating. Supplemental spraying of water aided in cooling the body and permitted longer exposure.

There was no difference in T(,re) and T(,sk) in all the six sweating efficiency tests. The HR was significantly higher in the w = 1.0 for both clothing conditions as compared to the other two target wettedness. The sweating efficiency was not significantly different between the sexes in either clothing condition; although, the women tended to sweat less. The sweating efficiency in the fully clothed condition was lower than in the seminude condition at all levels of wettedness. The relationship of w to (eta)(,s) for the fully clothed subjects was: (eta)(,s) = 1.15 -0.408 w (r = -0.54). It was concluded that wearing clothes in the heat lowers sweating efficiency to a greater degree than with exposed skin. Also, women appear to be more efficient than men in their sweating response.

Índice (detalles del documento)

Universidad: The Pennsylvania State University

Lugar de universidad: United States -- Pennsylvania

Fuente: DAI-A 43/07, p. 2277, Jan 1983

Tipo de fuente: Dissertation

Materias: Physical education

Número de la publicación: AAT 8228940

URL del documento: http://proquest.umi.com/pqdweb?did=748496401&sid=7&Fmt=2&cli

entId=45091&RQT=309&VName=PQD

Código de documento de ProQuest: 748496401

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