| Effects of short-term exercise training and activity restriction on functional capacity in patients with severe chronic congestive heart failure. | |
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MedLine Citation:
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PMID: 8916481 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Previous exercise training studies in patients with chronic congestive heart failure (CHF) were performed for periods lasting > 2 months, and effects of activity restriction on exercise induced-benefits were not systematically assessed. With one exception study, patients were not reported to be transplant candidates. In this random-order crossover study, effects of 3 weeks of exercise training and 3 weeks of activity restriction on functional capacity in 18 hospitalized patients with severe CHF [(mean +/- SEM) age 52 +/- 2 years; ejection fraction 21 +/- 1%; half of them on a transplant waiting list] were assessed. The training program consisted of interval exercise with bicycle ergometer (15 minutes) 5 times weekly, interval treadmill walking (10 minutes), and exercises (20 minutes), each 3 times weekly. With training, the onset of ventilatory threshold was delayed (p < 0.001), with increased work rate by 57% (p < 0.001) and oxygen uptake by 23.7% (p < 0.001). On average, there was a 14.6% decrease in slope of ventilation/carbon dioxide production before the onset of ventilatory threshold (p < 0.05), and ventilatory equivalent of carbon dioxide production by 10.3% (p < 0.01). At the highest comparable work rate (56 +/- 5 W) the following variables were decreased: heart rate (7.3%; p < 0.05), lactate (26.6%; p < 0.001), and ratings of perceived leg fatigue and dyspnea (14.5% and 16.5%; p < 0.001 each). At peak exercise, oxygen uptake was increased by 19.7% (p < 0.01) and oxygen pulse by 14.2% (p < 0.01). There was a correlation of baseline peak oxygen uptake and increase of peak oxygen uptake due to training (r = -0.75; p < 0.004). Independently of the random order, data after activity restriction did not differ significantly from data measured at baseline. Patients with stable, severe CHF can achieve significant improvements in aerobic and ventilatory capacity and symptomology by short-term exercise training using interval exercise methods. Impairments due to activity restriction suggest the need for long-term exercise training. |
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Authors:
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K Meyer; M Schwaibold; S Westbrook; R Beneke; R Hajric; L Görnandt; M Lehmann; H Roskamm |
Publication Detail:
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Type: Clinical Trial; Journal Article; Randomized Controlled Trial |
Journal Detail:
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Title: The American journal of cardiology Volume: 78 ISSN: 0002-9149 ISO Abbreviation: Am. J. Cardiol. Publication Date: 1996 Nov |
Date Detail:
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Created Date: 1996-12-11 Completed Date: 1996-12-11 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 0207277 Medline TA: Am J Cardiol Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 1017-22 Citation Subset: AIM; IM |
Affiliation:
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Herz-Zentrum Bad Krozingen, Freie Universität Berlin, Germany. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Chronic Disease Dyspnea / etiology Exercise* Fatigue Female Heart Failure / blood, complications, physiopathology*, therapy* Heart Rate Hemodynamics* Humans Lactic Acid / blood Leg Lung / physiopathology* Male Middle Aged Oxygen Consumption Physical Exertion* Respiratory Function Tests Severity of Illness Index |
| Chemical | |
Reg. No./Substance:
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50-21-5/Lactic Acid |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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