Journal of Applied Physiology AJP: Heart and Circulatory Physiology
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

J Appl Physiol 79: 1206-1211, 1995;
8750-7587/95 $5.00
This Article
Right arrow Full Text (PDF)
Right arrow Submit a response
Right arrow Alert me when this article is cited
Right arrow Alert me when eLetters are posted
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Turner, M. J.
Right arrow Articles by Keefer, D. J.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Turner, M. J.
Right arrow Articles by Keefer, D. J.

Journal of Applied Physiology, Vol 79, Issue 4 1206-1211, Copyright © 1995 by American Physiological Society

ARTICLES

Effect of graded epinephrine infusion on blood lactate response to exercise

M. J. Turner, E. T. Howley, H. Tanaka, M. Ashraf, D. R. Bassett Jr and D. J. Keefer
University of Tennessee, Knoxville 37996-2700, USA.

In an attempt to determine whether the lactate threshold (LT) is the result of a sudden increase in plasma epinephrine (Epi), eight healthy college-aged males (22.4 +/- 0.4 yr) were recruited to perform three cycle ergometer exercise tests. Each subject performed a graded exercise test (GXT) to determine LT, Epi threshold, and norepinephrine threshold (64.6 +/- 2.4, 62.5 +/- 2.4, and 60.8 +/- 4.3% peak oxygen uptake, respectively). Each subject also completed, in random order, two 30-min submaximal (20% peak oxygen uptake below LT) exercise tests. During one test, graded Epi infusions were carried out at rates of 0.02-0.12 micrograms.kg-1.min-1; the other served as a control test. Infusion resulted in plasma Epi concentrations similar to those observed during GXT. The increase in blood lactate with Epi infusion was significantly greater than that during the control test (3.0 +/- 0.3 vs. 1.4 +/- 0.1 mmol/l at minute 30) but did not approach levels exhibited during GXT. We suggest an interaction of the increasing plasma Epi with other factors may be responsible for the sudden increase in blood lactate during graded exercise.


This article has been cited by other articles:


Home page
 J. Appl. Physiol.Home page
T. M. Dean, L. Perreault, R. S. Mazzeo, and T. J. Horton
No effect of menstrual cycle phase on lactate threshold
J Appl Physiol, December 1, 2003; 95(6): 2537 - 2543.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
M. A. Febbraio, D. L. Lambert, R. L. Starkie, J. Proietto, and M. Hargreaves
Effect of epinephrine on muscle glycogenolysis during exercise in trained men
J Appl Physiol, February 1, 1998; 84(2): 465 - 470.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Visit Other APS Journals Online