Physiological strain index (PSI) was developed to evaluate heat and physiological strain by measurement HR and body core temperature.[6] Heat strain score index (HSSI) was developed to evaluate perceptual responses in Iranian women and men in hot workplaces.[7] The HSSI scale includes variable, observative and subjective questions, relating to heat stress such as thermal and humidity sensation,[8] intensity of sweating,[9] intensity of suffering from heat, dimensions of the working space, intensity of