Document Detail

Target-flow inspiratory muscle training: breathing patterns and metabolic costs.
MedLine Citation:
PMID:  1783476     Owner:  NLM     Status:  MEDLINE    
In target-flow inspiratory muscle training (TF-IMT), the generated inspiratory mouth pressure and the duration of the inspiration and expiration are standardized to given an adequate training stimulus to the inspiratory muscles. The acute effects of TF-IMT on the efficiency of breathing were studied in a group of 12 COPD patients with a ventilatory limitation of their exercise capacity (mean age 58, mean FEV1 46.2% of predicted) and in 15 normal subjects (mean age 30). Also, the effect of a 10 week period of TF-IMT on the maximal inspiratory mouth pressure (PImax) in the COPD patients was measured. After an unloaded baseline period, the subjects started to inspire through a target-flow device during 15 min, followed by a recovery phase of 5 min. During TF-IMT minute ventilation (VE) decreased only in the COPD group. The ventilatory equivalent for O2 (VE/VO2) and the dead space to tidal volume ratio (VD/VT) decreased in both groups. During recovery, VE, VE/VO2 and VD/VT remained below baseline values in the COPD group, but not in the control group. PCO2 and lactate concentrations did not change during TF-IMT. After the 10 week training period, PImax [means) (SD] increased from 5.7(2.2) to 8.2(2.7) kPa (p less than 0.05). The results indicate that with standardized TF-IMT, the inspiratory muscles can be trained effectively in COPD patients with a ventilatory limitation. The persistence of the decrease in VE, VE/VO2 and VD/VT after a training session may be an additional beneficial effect of TF-IMT.
P N Dekhuijzen; M T Hopman; R A Binkhorst; H T Folgering
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  International journal of rehabilitation research. Internationale Zeitschrift für Rehabilitationsforschung. Revue internationale de recherches de réadaptation     Volume:  14     ISSN:  0342-5282     ISO Abbreviation:  Int J Rehabil Res     Publication Date:  1991  
Date Detail:
Created Date:  1992-03-13     Completed Date:  1992-03-13     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  7805421     Medline TA:  Int J Rehabil Res     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  293-301     Citation Subset:  IM    
University of Nijmegen, The Netherlands.
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MeSH Terms
Blood Gas Analysis
Breathing Exercises*
Energy Metabolism*
Evaluation Studies as Topic
Inspiratory Capacity*
Lactates / blood
Lactic Acid
Lung Diseases, Obstructive / metabolism,  physiopathology,  therapy*
Lung Volume Measurements
Middle Aged
Respiratory Function Tests
Respiratory Muscles* / metabolism
Reg. No./Substance:
0/Lactates; 50-21-5/Lactic Acid

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

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