Document Detail

Comparison of submaximal exercise responses using the Bruce vs modified Bruce protocols.
MedLine Citation:
PMID:  8133729     Owner:  NLM     Status:  MEDLINE    
The purpose of this study was to determine whether the parameters commonly used to evaluate a training effect can be compared when serial tests are performed using different protocols. Thirty-two patients with stable coronary artery disease performed both the standard and modified Bruce protocols in a random order, 1 h apart. Physiologic variables at matched exercise stage I including heart rate (99 +/- 12 vs 101 +/- 14 bpm), rate-pressure product (15 +/- 3 vs 15 +/- 3 bpm x mmHg x 10(3)), and VO2 (13.5 +/- 2.1 vs 13.0 +/- 3.0 x min-1) were not significantly different for exercise tests performed using the standard vs modified Bruce protocols respectively. Similarly, these parameters were also nearly identical at matched exercise stage II. However, peak VO2 was significantly higher using the standard vs modified Bruce protocol, although the difference was small. Therefore, these data indicate that a difference in the heart rate response at matched submaximal workrates on tests using these two protocols before and after a training program is most likely due to a training effect. Conversely, improvements in peak VO2 using the standard vs modified Bruce are at least in part due to inherent differences in responses between these two protocols.
K J McInnis; G J Balady
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Publication Detail:
Type:  Clinical Trial; Comparative Study; Journal Article; Randomized Controlled Trial    
Journal Detail:
Title:  Medicine and science in sports and exercise     Volume:  26     ISSN:  0195-9131     ISO Abbreviation:  Med Sci Sports Exerc     Publication Date:  1994 Jan 
Date Detail:
Created Date:  1994-04-21     Completed Date:  1994-04-21     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8005433     Medline TA:  Med Sci Sports Exerc     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  103-7     Citation Subset:  IM; S    
Cardiovascular Exercise Center, Boston University Medical Center, University Hospital, MA.
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MeSH Terms
Blood Pressure / physiology
Clinical Protocols
Coronary Disease / physiopathology*
Exercise / physiology*
Exercise Test / methods*
Heart Rate / physiology
Middle Aged
Oxygen Consumption / physiology

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

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