Document Detail

Exercise performance improves in patients with COPD due to respiratory muscle endurance training.
MedLine Citation:
PMID:  16608934     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Impaired exercise tolerance is frequently observed in patients with COPD. Respiratory muscle endurance training (RMET) by means of normocapnic hyperpnea can be used to improve respiratory muscle function and probably exercise capacity. RMET is not applied on a large scale because complicated equipment is needed to maintain carbon dioxide homeostasis during hyperpnea, which can also be done by enlarging the dead space of the ventilatory system by breathing through a tube. Therefore, tube breathing might be a new, inexpensive method for home-based RMET. The aim of this study was to assess whether home-based RMET by means of tube breathing improves endurance exercise performance in patients with COPD. METHODS: We randomized 36 patients with moderate-to-severe COPD to RMET by paced tube breathing (n = 18) or sham training (control, n = 18). Both groups trained twice daily for 15 min, 7 days per week, for 5 weeks. RESULTS: Patients receiving RMET showed significant improvements in endurance exercise capacity (constant-load exercise on cycle ergometry; 18 min vs 28 min, p < 0.001), in perception of dyspnea (Borg score; 8.4 vs 5.4, p < 0.001), and respiratory muscle endurance capacity (sustainable inspiratory pressure; 25 cm H(2)O vs 31 cm H(2)O, p = 0.005). Quality of life (chronic respiratory disease questionnaire) also improved (78.7 to 86.6, p = 0.001). The control group showed no significant changes. CONCLUSION: Home-based RMET by means of tube breathing leads to a significant improvement of endurance exercise capacity, a reduction in perception of dyspnea, and an improvement in quality of life in patients with moderate-to-severe COPD.
Ralph J H Koppers; Petra J E Vos; Cecile R L Boot; Hans Th M Folgering
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Publication Detail:
Type:  Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Chest     Volume:  129     ISSN:  0012-3692     ISO Abbreviation:  Chest     Publication Date:  2006 Apr 
Date Detail:
Created Date:  2006-04-12     Completed Date:  2006-05-16     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0231335     Medline TA:  Chest     Country:  United States    
Other Details:
Languages:  eng     Pagination:  886-92     Citation Subset:  AIM; IM    
Medical Center Leeuwarden, PO Box 888, 8901 BR Leeuwarden, The Netherlands.
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MeSH Terms
Breathing Exercises*
Dyspnea / etiology,  prevention & control
Exercise Tolerance / physiology*
Middle Aged
Pulmonary Disease, Chronic Obstructive / complications,  physiopathology*,  rehabilitation*
Quality of Life
Respiratory Function Tests
Respiratory Muscles / physiopathology
Treatment Outcome

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

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