Journal
CANADIAN JOURNAL OF APPLIED PHYSIOLOGY-REVUE CANADIENNE DE PHYSIOLOGIE APPLIQUEE
Volume 28, Issue 5, Pages 685-698Publisher
HUMAN KINETICS PUBL INC
DOI: 10.1139/h03-052
Keywords
stress hormones; gender; luteal phase
Categories
Ask authors/readers for more resources
Supramaximal exercises are well known to induce a severe stress on the adrenal medulla and nervous sympathetic system. This stress induces increased plasma catecholamines concentrations. The responses of catecholamines to supramaximal exercises in women are still not well characterized and have been studied mostly in trained subjects. Hence the aim of the present study was to evaluate plasma catecholamine responses to a Wingate test in young and untrained women (n = 6) and men (n = 7): Venous plasma catecholamine concentrations were determined by HPLC at rest, at the end of the warm-up and of the exercise, and during recovery (5, 10, 20, and 30 mn). Our results failed to show any significant difference in resting catecholamine concentrations ([A](p): 0.41 +/- 0.05 vs. 0.45 +/- 0.05 nmol. L-1; [NA](p): 3.28 +/- 0.68 vs. 2.58 +/- 0.26 nmol.L-1), kinetics, and maximal plasma catecholamine concentrations (Amax: 4.47 +/- 1.08 vs. 3.31 +/- 0.63 nmol.L-1; NAmax: 18.05 +/- 1.11 vs. 14.01 +/- 2.02 nmol.L-1) in response to the Wingate test between women and men, respectively. The Amax/NAmax ratio used as an index of adrenal medulla sensitivity to sympathetic input was also similar between genders. In conclusion, this study was able to demonstrate, in untrained subjects, that gender did not alter the sympatho-adrenergic response induced by a severe stress.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available