[Study of work efficiency under high temperature environment and reasonable arrangement of work time]

The significant relationship of water loss rate (WLR) to air temperature and work intensity when people work in hot environment was developed in the field study 4000 g of water loss for a working day and 500 g for a working hour was used as the upper limitation for heat exposure, then the Allowable Continuous Heat Exposure Time (ACHET) and Total Heat Exposure Time (THET) were calculated at different air temperature and work intensity. In order to confirm the ACHET derived from field study, WLR and some other physiological examinations were done to the subjects in lab study. And the necessary rest time after each ACHET was also estimated by way of observing the recovery of physiological indexes of subjects.