Summary
The dynamics of sweating was investigated at rest in 8 men and 8 women. Electrical skin resistance (ESR), rectal temperature (Tre) and mean skin temperature \((\bar T_{sk} )\) were measured in subjects exposed to 40‡ C environmental temperature, 30% relative air humidity, and 1 m · s−1 air flow. Sweat rate was computed from continuous measurement of the whole body weight loss. It was found that increases in Tre, \((\bar T_{sk} )\) and mean body temperature \((\bar T_b )\) were higher in women than in men by 0.16, 0.38 and 0.21‡ C, but only the difference in δ \(\Delta \bar T_b \) was significant (p<0.05). The dynamics of sweating in men and women respectively, was as follows: delay (td) 7.8 and 18.1 min (p<0.01), time constant (Τ) 7.5 and 8.8 min (N.S.), inertia time (ti) 15.3 and 26.9 min (p<0.002), and total body weight loss 153 and 111 g · m−2 · h−1 (p<0.001). Dynamic parameters of ESR did not differ significantly between men and women. Inertia times of ESR and sweat rate correlated in men (r=0.93, p<0.001), and in women (r=0.76, p<0.02). In men, δ Tre correlated with inertia time of sweat rate (r=0.81, p<0.01) as well as with the inertia time of ESR (r=0.83, p<0.001). No relation was found between δ Tre and the dynamics of sweating in women. It is concluded that the dynamics of sweating plays a decisive role in limiting δ Tre in men under dry heat exposure. The later onset of sweating in women does not influence the rectal temperature increase significantly. In women, δ Tre is probably limited by a complex interaction of sweating, skin blood flow increase, and metabolic rate decrease.
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References
Adams T, Vaughan JA (1965) Human ecrine sweat gland activity and palmar electrical skin resistance. J Appl Physiol 20:980–983
Asayama M, Ogawa T, Yoshida K, Fuijmatsu H, Morimoto T (1981) Sex differences in metabolic responses to heat. J Aichi Med Univ Assoc 9:310–316
Avellini BA, Kamon E, Krajewski JT (1980) Physiological responses of physically fit men and women to acclimation to humid heat. J Appl Physiol: Respirat Environ Exercise Physiol 49:254–261
Berglund LR, McNall PE (1973) Human sweat film area and composition during prolonged sweating. J Appl Physiol 35:714–718
Bittel J, Henane R (1975) Comparison of thermal exchanges in men and women under neutral and hot conditions. J Physiol [Lond] 250:475–489
Candas V, Libert JP, Sagot JC, Vogt JJ (1982) Thermophysiological responses to humid heat: sex differences. J Physiol [Paris] 78:240–242
Colin J, Houdas Y (1965) Initiation of sweating in man after abrupt rise in environmental temperature. J Appl Physiol 20:984–990
Cunningham DJ, Stolwijk JAJ, Wenger CB (1978) Comparative thermoregulatory responses of resting men and women. J Appl Physiol: Respirat Environ Exercise Physiol 45:908–915
Fox RH, Lofstedt BE, Woodward PM, Eriksson E, Werkstrom B (1969) Comparison of thermoregulatory function in men and women. J Appl Physiol 26:444–453
Frye AJ, Kamon E (1981) Responses to dry heat of men and women with similar aerobic capacities. J Appl Physiol: Respirat Environ Exercise Physiol 50:65–70
Grucza R (1981) The use of transistor for measurement of body temperature. Acta Physiol Pol 32:761–764
Grucza R (1983) Body heat balance in man subjected to endogenous and exogenous heat load. Eur J Appl Physiol 51:419–433
Hardy JD, DuBois EF (1940) Differences between men and women in their response to heat and cold. Proc Natl Acad Sci [USA] 26:389–398
Hertig BA, Belding HS, Kraning KK, Batterton DL, Smith CR, Sargent II F (1963) Artificial acclimatization of women to heat. J Appl Physiol 18:383–386
Kuno Y (1965) The correlation of the skin galvanic resistance to sweating. In: Pitts RE (ed) Human perspiration. Thomas CC Springfield, Illinois, pp 376–381
Morimoto T, Slabochova Z, Naman R, Sargent II F (1967) Sex differences in physiological reactions to thermal stress. J Appl Physiol 22:526–532
Paolone AM, Wells CL, Kelly GT (1978) Sexual variations in thermoregulation during heat stress. Aviat Space Environ Med 49:715–719
Ramanathan NL (1964) A nwe weighting system for mean surface temperature of the human body. J Appl Physiol 19:531–533
Senay LC JR (1973) Body fluids of heat exposed women. J Physiol [Lond] 232:209–219
Shapiro Y, Pandolf KB, Avellini BA, Pimental NA, Goldman RF (1980) Physiological responses of men and women to humid and dry heat. J Appl Physiol: Respirat Environ Exercise Physiol 49:1–8
Shoenfeld Y, Udassin R, Shapiro Y, Ohri A, Sohar E (1978) Age and sex difference in response to short exposure to extreme dry heat. J Appl Physiol: Respirat Environ Exercise Physiol 44:1–4
Stolwijk, JAJ, Hardy D (1966) Partitional calorimetric studies of responses of man to thermal transients. J Appl Physiol 21:967–977
Thomas PE, Korr JM (1957) Relationship between sweat gland activity and electrical resistance of the skin. J Appl Physiol 10:505–510
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This work was supported by the Centre National de la Recherche Scientifique and Polish Academy of Siences
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Grucza, R., Lecroart, J.L., Hauser, J.J. et al. Dynamics of sweating in men and women during passive heating. Europ. J. Appl. Physiol. 54, 309–314 (1985). https://doi.org/10.1007/BF00426151
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DOI: https://doi.org/10.1007/BF00426151