Various factors have already been reported to influence the cardiovascular system (10, 11). Among them, dehydration and heat have been recognized as two factors that can influence the heart rate (12). Numerous studies have been carried out all over the world in the field of industrial heat stress that prove that heat stress leads to the deterioration of performance, efficiency, production, and thus quality of work (13–15). Moreover, gender differences in thermoregulation become more apparent with the greater thermal loads (16). Lower aerobic capacities for women increase the relative workload of a given task, and smaller blood volumes in women result in higher heart rates (17).