Effect of voluntary dehydration on thermoregulatory responses to heat in men and women

Abstract
Summary The effects of dehydration prior to heat exposure on sweating and body temperature were tested in 8 men and 8 women, dehydration being 1.3 and 1.0% of body weight, respectively. The subjects were exposed to 40° C for 60 min. Compared with controls (C), in the dehydrated men (D) there was a longer delay in the onset of sweating (C, 7.8, D, 11.6 min,p-2 · h−1,p< 0.001), and a greater increase in Tre (C, 0.31, D, 0.43° C,ppr=0.81,pr=0.83,p<0.01). It is concluded that dehydration affects sweating and body temperature in men more severely than in women.