Journal of Applied Physiology Journal of Neurophysiology
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

J Appl Physiol 76: 236-241, 1994;
8750-7587/94 $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 Marciniuk, D.
Right arrow Articles by Younes, M.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Marciniuk, D.
Right arrow Articles by Younes, M.

Journal of Applied Physiology, Vol 76, Issue 1 236-241, Copyright © 1994 by American Physiological Society

ARTICLES

Role of central respiratory muscle fatigue in endurance exercise in normal subjects

D. Marciniuk, D. McKim, R. Sanii and M. Younes
Department of Medicine, University of Manitoba, Winnipeg, Canada.

The role of central respiratory muscle fatigue in determining endurance time (ET) of steady-state ergometry, ventilation (VE), and breathing pattern during exhaustive submaximal exercise is not known. Six normal subjects exercised on a cycle ergometer to exhaustion at 72-82% of maximal power output on three occasions. During the second test, inspiratory muscle load was reduced (approximately 50% of baseline load) for all but the last 3 min of exercise. ET was determined, and VE, tidal volume (VT), respiratory rate (f), and sense of breathing effort (Borg scale) were assessed at different points during the assisted exercise and compared with the values obtained at the same time in identical tests without assist, carried out before and after the assisted test (different days). Borg scale rating was less and there was a nonsignificant trend for VT and VE to be higher and for f to be lower when the assist was in place than at the same time during the unassisted runs. In the last 3 min of exercise, when the respiratory load was comparable (assist removed) but ventilatory work history was different, there were no significant differences in sense of respiratory effort, VE, VT, or f between the experimental and control tests, and ET was also similar. We conclude that central respiratory muscle fatigue plays no role in determining ET, sense of respiratory effort, or breathing pattern in normal subjects during exhaustive submaximal exercise.


This article has been cited by other articles:


Home page
 J. Appl. Physiol.Home page
L. M. Romer and M. I. Polkey
Exercise-induced respiratory muscle fatigue: implications for performance
J Appl Physiol, March 1, 2008; 104(3): 879 - 888.
[Abstract] [Full Text] [PDF]

Home page
 J. Exp. Biol.Home page
R. B. Schoene
Limits of human lung function at high altitude
J. Exp. Biol., March 11, 2002; 204(18): 3121 - 3127.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
C. A. Harms, T. J. Wetter, C. M. St. Croix, D. F. Pegelow, and J. A. Dempsey
Effects of respiratory muscle work on exercise performance
J Appl Physiol, July 1, 2000; 89(1): 131 - 138.
[Abstract] [Full Text] [PDF]


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