Document Detail


A comparison of ambulatory oxygen consumption during circuit training and aerobic exercise in patients with chronic heart failure.
MedLine Citation:
PMID:  11409228     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
PURPOSE: This study compared the exercise intensity of a combined aerobic and resistance exercise circuit training session with the exercise intensity of continuous aerobic exercise in patients with chronic heart failure (CHF). METHODS: Peak oxygen consumption (VO2peak) and muscular strength (1 repetition maximum) were assessed in six CHF patients (age 62 +/- 3 years). Heart rate, rate of perceived exertion (RPE), blood pressures, ambulatory oxygen consumption (VO2), and ventilatory data were measured during two types of exercise: continuous cycling on a bicycle ergometer (aerobic [AER] session) and combined AER and resistance exercise (circuit training [CIR] session). RESULTS: There were no significant differences in VO2, RPE, heart rate, or hemodynamic responses (rate pressure product, diastolic blood pressure, or mean arterial pressure) during exercise, between the two sessions. Systolic blood pressure was significantly lower during CIR (P < 0.05). Minute ventilation and tidal volume were significantly higher (P < 0.0001 and P < 0.01, respectively) and respiratory frequency significantly lower (P < 0.005) during CIR. During CIR, RPE significantly correlated with VO2 (P < 0.01), whereas heart rate did not. Conversely, during the AER session HR correlated with VO2 (P < 0.01), but RPE did not. CONCLUSIONS: Circuit training is a well-tolerated form of exercise training for CHF patients that is associated with similar oxygen and hemodynamic demand to aerobic exercise. Results suggest that RPE may be a better method of prescribing and monitoring exercise intensity during CIR, with heart rate the preferred measure of intensity during aerobic exercise.
Authors:
D J Green; K Watts; A J Maiorana; J G O'Driscoll
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of cardiopulmonary rehabilitation     Volume:  21     ISSN:  0883-9212     ISO Abbreviation:  J Cardiopulm Rehabil     Publication Date:    2001 May-Jun
Date Detail:
Created Date:  2001-06-18     Completed Date:  2001-10-25     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  8511296     Medline TA:  J Cardiopulm Rehabil     Country:  United States    
Other Details:
Languages:  eng     Pagination:  167-74     Citation Subset:  IM    
Affiliation:
Department of Human Movement and Exercise Science, University of Western Australia, Nedlands 6907, Western Australia. brevis@cyllene.uwa.edu.au
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MeSH Terms
Descriptor/Qualifier:
Aged
Biomechanics
Chronic Disease
Exercise / physiology*
Heart Failure / physiopathology*,  therapy
Hemodynamics / physiology
Humans
Male
Middle Aged
Monitoring, Ambulatory
Oxygen Consumption / physiology*
Physical Education and Training / methods*
Tidal Volume / physiology

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


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