Document Detail

Determining the role of exercise in patients with chronic pulmonary disease.
MedLine Citation:
PMID:  7723635     Owner:  NLM     Status:  MEDLINE    
Chronic pulmonary diseases are common in the community and their pathophysiology is complex. The principal symptoms are dyspnea and limited exercise capacity. Some, but not all, patients have true ventilatory limitation where the maximal exercise ventilation (VEmax) equals the measured maximal ventilatory volume (MVV). Those with obstructive disease have impeded expiration requiring an obligatory expiratory time for adequate lung emptying (i.e., a timing constraint). In these patients, increased breathing frequency during exercise tends to lead to hyperinflation and smaller tidal volumes, circumstances that predictably worsen breathing efficiency (i.e., result in high VD/VT). Those with restrictive disease characteristically have limited inspiratory capacity but unimpeded or even accelerated expiration (i.e. tidal volume constraint). These patients characteristically exhibit rapid respiratory rates (e.g., > 50.min-1) at end exercise.
C B Cooper
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Publication Detail:
Type:  Journal Article; Review    
Journal Detail:
Title:  Medicine and science in sports and exercise     Volume:  27     ISSN:  0195-9131     ISO Abbreviation:  Med Sci Sports Exerc     Publication Date:  1995 Feb 
Date Detail:
Created Date:  1995-05-25     Completed Date:  1995-05-25     Revised Date:  2005-11-16    
Medline Journal Info:
Nlm Unique ID:  8005433     Medline TA:  Med Sci Sports Exerc     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  147-57     Citation Subset:  IM; S    
UCLA School of Medicine 90095-1690, USA.
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MeSH Terms
Chronic Disease
Exercise / physiology*
Exercise Therapy
Lung Diseases / physiopathology*,  psychology,  therapy
Pulmonary Gas Exchange
Respiratory Mechanics / physiology

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