Document Detail

Hormonal and metabolic responses to exercise across time of day and menstrual cycle phase.
MedLine Citation:
PMID:  9390951     Owner:  NLM     Status:  MEDLINE    
Two studies, each utilizing short-term treadmill exercise of a different intensity, assessed the metabolic and hormonal responses of women to exercise in the morning (AM) and late afternoon (PM). In study 1, plasma concentrations of growth hormone, arginine vasopressin, catecholamines, adrenocorticotropic hormone, cortisol, lactate, and glucose were measured before, during, and after high-intensity exercise (90% maximal O2 uptake) in the AM and PM. In study 2, plasma concentrations of adrenocorticotropic hormone, cortisol, lactate, and glucose were measured before, during, and after moderate-intensity exercise (70% maximal O2 uptake) in the AM and PM in the follicular (days 3-9), midcycle (days 10-16), and luteal (days 18-26) phases of the menstrual cycle. The results of studies 1 and 2 revealed no significant diurnal differences in the magnitude of responses for any measured variable. In addition, study 2 revealed a significant time-by-phase interaction for glucose (P = 0. 014). However, net integrated responses were similar across cycle phases. These data suggest that metabolic and hormonal responses to short-term, high-intensity exercise can be assessed with equal reliability in the AM and PM and that there are subtle differences in blood glucose responses to moderate-intensity exercise across menstrual cycle phase.
E A Galliven; A Singh; D Michelson; S Bina; P W Gold; P A Deuster
Publication Detail:
Type:  Clinical Trial; Journal Article    
Journal Detail:
Title:  Journal of applied physiology (Bethesda, Md. : 1985)     Volume:  83     ISSN:  8750-7587     ISO Abbreviation:  J. Appl. Physiol.     Publication Date:  1997 Dec 
Date Detail:
Created Date:  1998-02-10     Completed Date:  1998-02-10     Revised Date:  2013-09-26    
Medline Journal Info:
Nlm Unique ID:  8502536     Medline TA:  J Appl Physiol (1985)     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1822-31     Citation Subset:  IM    
Department of Military and Emergency Medicine, Uniformed Services University of the Health Sciences, Bethesda, Maryland 20814, USA.
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MeSH Terms
Blood Glucose / metabolism
Circadian Rhythm / physiology
Exercise / physiology*
Glucocorticoids / blood
Heart Rate / physiology
Hormones / physiology*
Hydrocortisone / blood
Hypothalamo-Hypophyseal System / physiology
Lactic Acid / blood
Menstrual Cycle / metabolism,  physiology*
Oxygen Consumption / physiology
Pituitary-Adrenal System / physiology
Time Factors
Reg. No./Substance:
0/Blood Glucose; 0/Glucocorticoids; 0/Hormones; 50-21-5/Lactic Acid; 50-23-7/Hydrocortisone

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