Document Detail

Changes in gas exchange kinetics with training in patients with spinal cord injury.
MedLine Citation:
PMID:  8897377     Owner:  NLM     Status:  MEDLINE    
We examined the ability of patients with spinal cord injury to undergo adaptations to chronic exercise training (cycle ergometry) invoked by functional electrical stimulation (FES) of the legs. Nine such patients performed incremental and constant work rate exercise before and after exercise training. Exercise sessions averaged 2.1 +/- 0.4/wk, and consisted of 30 min/session of continuous FES recumbent cycling with increasing work rate as tolerated. Peak VO2 and peak work rate significantly improved with training. Peak VO2 was significantly correlated with peak heart rate both before and after training (r = 0.97 pre and 0.85 post, P < 0.01 for both). The time course of the VO2, VCO2 and VE responses to constant-load exercise (unloaded cycling) and in recovery (mean response time MRT) were very long prior to training, and became significantly faster following training. However, there was no correlation between percentage improvement in either MRTon or MRToff for VO2 and the percentage increase in peak VO2. Exercise tolerance in these patients with spinal cord injury appears to be a direct function of the ability to increase heart rate. Further, exercise training can elicit significant improvements in both exercise tolerance and in gas exchange kinetics, even when performed only twice per week. However, these improvements may be accomplished by different mechanisms.
T J Barstow; A M Scremin; D L Mutton; C F Kunkel; T G Cagle; B J Whipp
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Medicine and science in sports and exercise     Volume:  28     ISSN:  0195-9131     ISO Abbreviation:  Med Sci Sports Exerc     Publication Date:  1996 Oct 
Date Detail:
Created Date:  1997-02-20     Completed Date:  1997-02-20     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  8005433     Medline TA:  Med Sci Sports Exerc     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1221-8     Citation Subset:  IM; S    
Department of Medicine, Harbor-UCLA Medical Center, Torrance, CA 90509, USA.
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MeSH Terms
Adaptation, Physiological*
Electric Stimulation
Exercise / physiology*
Heart Rate
Leg / physiology
Oxygen Consumption
Paraplegia / etiology,  physiopathology
Physical Education and Training* / methods
Pulmonary Gas Exchange*
Quadriplegia / etiology,  physiopathology
Spinal Cord Injuries / complications,  physiopathology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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