| Determining the role of exercise in patients with chronic pulmonary disease. | |
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MedLine Citation:
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PMID: 7723635 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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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. |
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Authors:
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C B Cooper |
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Publication Detail:
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Type: Journal Article; Review |
Journal Detail:
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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:
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Created Date: 1995-05-25 Completed Date: 1995-05-25 Revised Date: 2005-11-16 |
Medline Journal Info:
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Nlm Unique ID: 8005433 Medline TA: Med Sci Sports Exerc Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 147-57 Citation Subset: IM; S |
Affiliation:
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UCLA School of Medicine 90095-1690, USA. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Chronic Disease Exercise / physiology* Exercise Therapy Humans Lung Diseases / physiopathology*, psychology, therapy Pulmonary Gas Exchange Respiratory Mechanics / physiology |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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