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Catecholamines and metabolic responses to submaximal exercise in untrained men and women

Catecholamines and metabolic responses to submaximal exercise in untrained men and women The influence of exercise on blood borne substrates in relation to plasma catecholamine (CA) levels has been studied in untrained subjects (eight men and eight women). Subjects pedalled a bicycle ergometer for 20 min at a workload approximating to 80% maximal aerobic power. During exercise women reacted similarly to men except that their weight loss and hematocrit were significantly lower. At the end of the bicycling test, plasma dopamine (DA), norepinephrine (NE) and epinephrine (E) concentrations increased similarly in both groups. There was no significant difference in blood energy substrates between men and women except that the plasma free fatty acid (FFA) level was significantly higher in the female. When fitness levels were similar, the previously reported sex-related difference in response to exercise seemed to disappear. The lack of correlation between blood borne substrates variations and CA changes raised the question whether other hormonal factors combined with CA could play a role in the mobilization of energy substrates during exercise. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png European Journal of Applied Physiology Springer Journals

Catecholamines and metabolic responses to submaximal exercise in untrained men and women

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References (34)

Publisher
Springer Journals
Copyright
Copyright © 1983 by Springer-Verlag
Subject
Biomedicine; Human Physiology; Occupational Medicine/Industrial Medicine; Sports Medicine
ISSN
1439-6319
eISSN
1439-6327
DOI
10.1007/BF00423245
Publisher site
See Article on Publisher Site

Abstract

The influence of exercise on blood borne substrates in relation to plasma catecholamine (CA) levels has been studied in untrained subjects (eight men and eight women). Subjects pedalled a bicycle ergometer for 20 min at a workload approximating to 80% maximal aerobic power. During exercise women reacted similarly to men except that their weight loss and hematocrit were significantly lower. At the end of the bicycling test, plasma dopamine (DA), norepinephrine (NE) and epinephrine (E) concentrations increased similarly in both groups. There was no significant difference in blood energy substrates between men and women except that the plasma free fatty acid (FFA) level was significantly higher in the female. When fitness levels were similar, the previously reported sex-related difference in response to exercise seemed to disappear. The lack of correlation between blood borne substrates variations and CA changes raised the question whether other hormonal factors combined with CA could play a role in the mobilization of energy substrates during exercise.

Journal

European Journal of Applied Physiology – Springer Journals

Published: Sep 22, 2004

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