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


     

J Appl Physiol 41: 905-909, 1976;
8750-7587/76 $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 Stremel, R. W.
Right arrow Articles by Greenleaf, J. E.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Stremel, R. W.
Right arrow Articles by Greenleaf, J. E.

Journal of Applied Physiology, Vol 41, Issue 6 905-909, Copyright © 1976 by American Physiological Society

ARTICLES

Cardiorespiratory deconditioning with static and dynamic leg exercise during bed rest

R. W. Stremel, V. A. Convertino, E. M. Bernauer and J. E. Greenleaf

Bed rest deconditioning was assessed in seven healthy men (19-22 yr) following three 14-day periods of controlled activity during recumbency by measuring submaximal and maximal oxygen uptake (VO2), ventilation (VE), heart rate, and plasma volume. Exercise regimens were performed in the supine position and included a) two 30-min periods daily of intermittent static exercise at 21% of maximal leg extension force, and b) two 30-min periods of dynamic bicycle ergometer exercise daily at 68% of VO2max. No prescribed exercise was performed during the third bed rest period. Compared with their respective pre-bed rest control values, VO2max decreased (P less than 0.05) under all exercise conditions; -12.3% with no exercise, -9.2% with dynamic exercise, but only -4.8% with static exercise. Maximal heart rate was increased by 3.3% to 4.9% (P less than 0.05) under the three exercise conditions, while plasma volume decreased (P less than 0.05) -15.1% with no exercise and -10.1% with static, but only -7.8% (NS) with dynamic exercise. Since neither the static nor dynamic exercise training regimes minimized the changes in all the variables studied, some combination of these two types of exercise may be necessary for maximum protection from the effects of the bed deconditioning.


This article has been cited by other articles:


Home page
 Proc Am Thorac SocHome page
W. M. Chatila, B. M. Thomashow, O. A. Minai, G. J. Criner, and B. J. Make
Comorbidities in Chronic Obstructive Pulmonary Disease
Proceedings of the ATS, May 1, 2008; 5(4): 549 - 555.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
T. Trappe, S. Trappe, G. Lee, J. Widrick, R. Fitts, and D. Costill
Cardiorespiratory responses to physical work during and following 17 days of bed rest and spaceflight
J Appl Physiol, March 1, 2006; 100(3): 951 - 957.
[Abstract] [Full Text] [PDF]

Home page
 Arch Fam MedHome page
P. Rousseau
Immobility in the Aged
Arch Fam Med, February 1, 1993; 2(2): 169 - 177.
[Abstract] [PDF]


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