he present work considers the physiological responses of a fire fighter to work in a hot humid environment, by discussing work rate, ambient conditions, protective clothing, heart rate, oxygen uptake, and temperature regulation.;A preliminary experimental study examined the additional physiological strain which protective clothing and a breathing apparatus produces in a fire fighter. Five professional fire fighters (mean age 33.2 ;A second study examined whether a more efficient cooling technique, interjected between work periods, can decrease the degree of heat stress during repetitive fire fighting activity. Twelve professional fire fighters (mean age 31.8... |