Decreased thermal conductance during the luteal phase of the menstrual cycle in women.

Details

Serval ID
serval:BIB_F7B9BF9E7E64
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Decreased thermal conductance during the luteal phase of the menstrual cycle in women.
Journal
Journal of Applied Physiology
Author(s)
Frascarolo P., Schutz Y., Jéquier E.
ISSN
8750-7587 (Print)
ISSN-L
0161-7567
Publication state
Published
Issued date
1990
Volume
69
Number
6
Pages
2029-2033
Language
english
Notes
Publication types: Journal Article
Publication Status: ppublish
Abstract
To study the influence of the menstrual cycle on whole body thermal balance and on thermoregulatory mechanisms, metabolic heat production (M) was measured by indirect calorimetry and total heat losses (H) were measured by direct calorimetry in nine women during the follicular (F) and the luteal (L) phases of the menstrual cycle. The subjects were studied while exposed for 90 min to neutral environmental conditions (ambient temperature 28 degrees C, relative humidity 40%) in a direct calorimeter. The values of M and H were not modified by the phase of the menstrual cycle. Furthermore, in both phases the subjects were in thermal equilibrium because M was similar to H (69.7 +/- 1.8 and 72.1 +/- 1.8 W in F and 70.4 +/- 1.9 and 71.4 +/- 1.7 W in L phases, respectively). Tympanic temperature (Tty) was 0.24 +/- 0.07 degrees C higher in the L than in the F phase (P less than 0.05), whereas mean skin temperature (Tsk) was unchanged. Calculated skin thermal conductance (Ksk) was lower in the L (17.9 +/- 0.6 W.m-2.degrees C-1) than in the F phase (20.1 +/- 1.1 W.m-2.degrees C-1; P less than 0.05). Calculated skin blood flow (Fsk) was also lower in the L (0.101 +/- 0.008 l.min-1.m-2) than in the F phase (0.131 +/- 0.015 l.min-1.m-2; P less than 0.05). Differences in Tty, Ksk, and Fsk were not correlated with changes in plasma progesterone concentration. It is concluded that, during the L phase, a decreased thermal conductance in women exposed to a neutral environment allows the maintenance of a higher internal temperature.
Keywords
Adult, Body Temperature, Body Temperature Regulation, Calorimetry, Female, Follicular Phase/physiology, Humans, Luteal Phase/physiology, Mathematics, Progesterone/blood, Regional Blood Flow, Skin/blood supply, Skin Temperature
Pubmed
Web of science
Create date
21/01/2008 13:09
Last modification date
20/08/2019 16:23
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