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

Détails

ID Serval
serval:BIB_F7B9BF9E7E64
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Decreased thermal conductance during the luteal phase of the menstrual cycle in women.
Périodique
Journal of Applied Physiology
Auteur(s)
Frascarolo P., Schutz Y., Jéquier E.
ISSN
8750-7587 (Print)
ISSN-L
0161-7567
Statut éditorial
Publié
Date de publication
1990
Volume
69
Numéro
6
Pages
2029-2033
Langue
anglais
Notes
Publication types: Journal Article
Publication Status: ppublish
Résumé
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.
Mots-clé
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
Création de la notice
21/01/2008 14:09
Dernière modification de la notice
03/03/2018 22:50
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