Journal of Applied Physiology Fuel your research with LabChart
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

J Appl Physiol 102: 94-102, 2007. First published September 7, 2006; doi:10.1152/japplphysiol.00586.2006 Free Article
8750-7587/07 $8.00
This Article
Free upon publication Free Article
Right arrow Full Text Free
Right arrow Full Text (PDF) Free
Right arrow All Versions of this Article:
102/1/94    most recent
00586.2006v1
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
Right arrow Citation Map
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 Google Scholar
Google Scholar
Right arrow Articles by French, D. N.
Right arrow Articles by Maresh, C. M.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by French, D. N.
Right arrow Articles by Maresh, C. M.

Anticipatory responses of catecholamines on muscle force production

Duncan N. French,1 William J. Kraemer,1 Jeff S. Volek,1 Barry A. Spiering,1 Daniel A. Judelson,1 Jay R. Hoffman,2 and Carl M. Maresh1

1Human Performance Laboratory, Department of Kinesiology, University of Connecticut, Storrs, Connecticut; and 2Department of Health and Exercise Science, The College of New Jersey, Ewing, New Jersey

Submitted 22 May 2006 ; accepted in final form 28 August 2006

Few data exist on the temporal relationship between catecholamines and muscle force production in vivo. The purpose of this study was to examine the influence of preexercise arousal on sympathoadrenal neurohormones on muscular force expression during resistance exercise. Ten resistance-trained men completed two experimental conditions separated by 7 days: 1) acute heavy resistance exercise protocol (AHREP; 6 x 10 repetitions parallel squats, 80% 1 repetition maximum) and 2) control (Cont; rest). Peak force (Fpeak) was recorded during a maximal isometric squat preceding each set and mean force (Fmean) was measured during each set. Serial venous blood samples were collected before the AHREP and immediately preceding each set. Blood collection times were matched during Cont. Preexercise epinephrine (Epi), norepinephrine (NE), and dopamine (DA) increased (P ≤ 0.05) above Cont by 270, 255, and 164%, respectively. During exercise, Epi, NE, and DA continued to increase by 512, 271, and 38%, respectively, above preexercise values. Fpeak and Fmean decreased by ~20–25% over the course of the AHREP. Post hoc data analysis revealed that five subjects (Fmaintainers) showed no decline (P ≥ 0.05) in muscular performance (Fpeak, Fmean) during AHREP and that five subjects (Freducers) had significant reductions in Fpeak and Fmean. Integrated area under the curve for Epi, NE, and Fpeak were greater (P < 0.02) for Fmaintainers than Freducers. In conclusion, an anticipatory rise in catecholamines existed, which may be essential for optimal force production at the onset of exercise.

epinephrine; norepinephrine; dopamine; strength; resistance exercise


Address for reprint requests and other correspondence: W. J. Kraemer, Human Performance Laboratory, Dept. of Kinesiology, Unit 1110, Univ. of Connecticut, Storrs, CT 06269-1110 (e-mail:William.Kraemer{at}uconn.edu)






HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Visit Other APS Journals Online
Copyright © 2007 by the American Physiological Society.