The Effect of Volume of Consumed Water on Drinking-Induced Sweating and Plasma Levels of Arginine Vasopressin, Epinephrine and Norepinephrine

Khamnei S; Hosseinlou A; Ibrahimi H

International Journal of Endocrinology and Metabolism

Research Institute for Endocrine Sciences

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The Effect of Volume of Consumed Water on Drinking-Induced Sweating and Plasma Levels of Arginine Vasopressin, Epinephrine and Norepinephrine

Author(s):

Khamnei S¹,

Hosseinlou A²,

Ibrahimi H¹

1Applied Drug Research Center, Tabriz University of Medical Sciences, LR. Iran

2Applied Drug Research Center, Tabriz University of Medical Sciences, *, LR. Iran

International Journal of Endocrinology and Metabolism:Vol. 2, issue 1; 19-28

Published online:Jan 31, 2004

Article type:Research Article

Received:Jan 01, 2004

Accepted:Jan 01, 2004

How to Cite:S K, A H, H I. The Effect of Volume of Consumed Water on Drinking-Induced Sweating and Plasma Levels of Arginine Vasopressin, Epinephrine and Norepinephrine. Int J Endocrinol Metab. 2004;2(1):. doi:

Abstract

The purpose of this study was to investigate the effect of the volume of consumed water on the sweating response and plasma levels of arginine vasopressin, epinephrine and norepinephrine in the first few minutes of drinking.
Materials and Methods: After 4 hours water deprivation, six healthy male medical students were exposed to heat and performed mild exercise under an ambient temperature (2 hours, 38-40°C, relative humidity<30tYt,). Subjects were dehydrated by sweating. They were then allowed to drink water with volumes of 1,3, and ml/kg of body weight using three separate protocols. Sweat rate was measured by amount of sweat collected from the forehead area in grams during 3 minute periods before and after drinking. Blood samples were drawn before heat exposure, before drinking and then every 3 minutes up to the 15th minute after drinking.
Results: Dehydration increased mean serum sodium (p<0.00l). Sweating increased markedly just after the onset of drinking (p<0.0l) and was greater when consumed water was 5ml/kg of body weight. The more the water volume consumed, the greater was the reduction in plasma arginine vasopressin 3 minutes after drinking. The reverse was true for plasma norepinephrine (p<0.0l), whereas plasma epinephrine was essentially
unchanged by drinking.
Conclusion: These data suggest that oropharyngeal sensors that interfere with the activation of sweating response can also manipulate it by consumed water volume. Moreover, the amount of water received affected plasma arginine vasopressin and norepinephrine but not plasma epinephrine which suggests a drinking stimulated neural mechanism.

Keywords

Consumed water volume

Oropharyngeal receptors

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Author(s):

Khamnei S:[PubMed][Scholar]
Hosseinlou A:[PubMed][Scholar]
Ibrahimi H:[PubMed][Scholar]

Research Institute for Endocrine Sciences

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The Effect of Volume of Consumed Water on Drinking-Induced Sweating and Plasma Levels of Arginine Vasopressin, Epinephrine and Norepinephrine

Abstract

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