Sweating responses to a sustained static exercise is dependent on thermal load in humans

• Published in: Acta physiologica Scandinavica 2002-08, Vol.175 (4), p.289-295
• Main Authors: Kondo, N., Horikawa, N., Aoki, K., Shibasaki, M., Inoue, Y., Nishiyasu, T., Crandall, C. G.
• Format: Article
• Language: English
• Subjects: Adult; Biological and medical sciences; Blood Pressure - physiology; Body Temperature - physiology; cutaneous vascular response; Esophagus - physiology; Exercise - physiology; Fundamental and applied biological sciences. Psychology; Heart Rate - physiology; Humans; isometric handgrip exercise; Male; non-thermal factors; Skin Temperature - physiology; Space life sciences; Sweating - physiology; thermal factors; Thermoregulation. Hibernation. Estivation. Ecophysiology and environmental effects; Vertebrates: anatomy and physiology, studies on body, several organs or systems
• ISSN: 0001-6772; 1365-201X
• DOI: 10.1046/j.1365-201X.2002.00994.x

ABSTRACT The purpose of this project was to test the hypothesis that internal temperature modulates the sweating response to sustained handgrip exercise. Ten healthy male subjects immersed their legs in 43 °C water for 30–40 min at an ambient temperatures of 30 °C and a relative humidity of 50%. Sweating responses to 50% maximal voluntary contraction isometric handgrip exercise (IH) were measured following the onset of sweating (i.e. following slight increases in internal temperature), and after more pronounced increases in internal temperature. Oesophageal temperature (Tes) was significantly lower during the first bout of exercise (37.54 ± 0.07 °C) relative to the second bout (37.84 ± 0.12 °C; P