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Acute Responses to High-Intensity Intermittent Exercise in CHD Patients.
MedLine Citation:
PMID:  20543746     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
PURPOSE: : Although the acute physiological responses to continuous exercise have been well documented in CHD patients, no previous study has examined the responses to high-intensity intermittent exercise in these patients. The purpose of this study was to compare the physiological responses to a high-intensity interval exercise (HIIE) protocol versus a moderate-intensity continuous exercise (MICE) protocol of similar energy expenditure in CHD patients.
METHODS: : Twenty patients with stable CHD (19 males and 1 female, 62 ± 11 yr) were assigned in random order to a single session of HIIE corresponding to 15-s intervals at 100% of peak power output (PPO) and 15-s passive recovery intervals and, 2 wk later, to an isocaloric MICE corresponding to 70% of PPO.
RESULTS: : Both protocols were equivalent in terms of energy expenditure. The HIIE protocol resulted in lower mean ventilation (P < 0.001) for a small difference in metabolic demand. All participants preferred the HIIE mainly because the perceived exertion measured by the Borg scale was lower (P < 0.05). No elevation of serum concentration of troponin T was found in all participants at baseline and at 20 min and 24 h after the exercise sessions, thus excluding the presence of any exercise-induced myocardial injury in our patients.
CONCLUSIONS: : When considering physiological responses, safety, and perceived exertion, the HIIE protocol seemed to be well tolerated and more efficient in this group of stable CHD patients.
Authors:
Thibaut Guiraud; Anil Nigam; Martin Juneau; Philippe Meyer; Mathieu Gayda; Laurent Bosquet
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Medicine and science in sports and exercise     Volume:  43     ISSN:  1530-0315     ISO Abbreviation:  Med Sci Sports Exerc     Publication Date:  2011 Feb 
Date Detail:
Created Date:  2011-01-18     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8005433     Medline TA:  Med Sci Sports Exerc     Country:  United States    
Other Details:
Languages:  eng     Pagination:  211-7     Citation Subset:  IM; S    
Affiliation:
1Montreal Heart Institute, Cardiovascular Prevention Centre (Centre ÉPIC), University de Montreal, Montreal, CANADA; 2Department of Kinesiology, University de Montreal, Montreal, CANADA; and 3Faculty of Sports Sciences, University of Poitiers, Poitiers, FRANCE.
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