고온환경하의 작업내력에 관한 연구

Abstract

It has long been known that the heat stagnation would be liable to occur on the heavy physical work and exercise under the high temperature environment. However the practical determination of the maximum tolerance of working time on the condition of various degrees of the relative metabolic rate and temperatures would be pursued on the point of the industrial medicine and military hygiene. In this demand auther canied out this experiment for the 16 healthy young Korean to know the maximum tolerance of working time under the high temperatures, as 27° C, 33° C. 35° C. 37° C and 40° C (maintaining 4.0 of R.M.R.) Objectives were exposed to above temperatures for 1 hr, 2 hrs and 3 hrs and observed the various physiological changes such as the pulse rate, the oxygen consumption rate. the R. M.R., the rectal temperature. the plama sodium concentration and the water content which would affliate closely with the potentiality working. The results obtained were as following. 1. The maximum tolerance of working time showed shortening proportional to the rise of the environmental temperature. This trend showed markedly above 35°C. 2. Average time of maximum tolerance of Korean showed more or less longer than that of the Japanese. 3. The close relatinghip between the physiological changes and the tolerance of working under high temperature environmenta was recognizable particularly the pulse rate, the oxygen consumption and the rectal temperature were prominent.