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VO2 kinetics of constant-load exercise following bed-rest-induced deconditioningPrevious studies have shown that the oxygen uptake kinetics during exercise and recovery may be changed by alterations in work intensity, prior exercise, muscle group involvement, ambient conditions, posture, disease state, and level of physical conditioning. However, the effects of detraining on oxygen uptake kinetics have not been determined. The present investigation has the objective to determine the effects of deconditioning following seven days of continuous head-down bed rest on changes in steady-state oxygen uptake, O2 deficit, and recovery oxygen uptake during the performance of constant-load exercise. The obtained results may provide support for previous proposals that submaximal oxygen uptake was significantly reduced following bed rest. The major finding was that bed-rest deconditioning resulted in a reduction of total O2 transport/utilization capacity during the transient phase of upright but not supine exercise.
Document ID
Document Type
Reprint (Version printed in journal)
Convertino, V. A.
(NASA Ames Research Center Moffett Field, CA, United States)
Goldwater, D. J.
(NASA Ames Research Center Moffett Field, CA, United States)
Sandler, H.
(NASA Ames Research Center Biomedical Research Div., Moffett Field, CA; Arizona, University, Tucson, AZ, United States)
Date Acquired
August 12, 2013
Publication Date
November 1, 1984
Publication Information
Publication: Journal of Applied Physiology: Respiratory, Environmental and Exercise Physiology
Volume: 57
ISSN: 0161-7567
Subject Category
Aerospace Medicine
Accession Number
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