| Effects of exercise rehabilitation program on heart rate recovery in patients with chronic heart failure. | |
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MedLine Citation:
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PMID: 16449866 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND: Heart rate recovery (HRR1) immediately after exercise reflects parasympathetic activity, which is markedly attenuated in chronic heart failure (CHF) patients. The aim of our study was to examine both continuous and interval exercise training effects on HRR1 in these patients. DESIGN: The population study consisted of 29 stable CHF patients that participated at a rehabilitation program of 36 sessions, three times per week. Of the 29 patients, 24 completed the program. Patients were randomly assigned to interval {n=10 [100% peak work rate (WRp) for 30 s, alternating with rest for 30 s]} and to continuous training [n=14 (50%WRp)]. METHODS: All patients performed a symptom-limited cardiopulmonary exercise test on a cycle ergometer before and after the completion of the program. Measurements included peak oxygen uptake (VO2p), anaerobic threshold (AT), WRp, first degree slope of VO2 during the first minute of recovery (VO2/t-slope), chronotropic response [% chronotropic reserve (CR)=(peak HR - resting HR)x100/(220 - age - resting HR)], HRR1 (HR difference from peak exercise to one minute after). RESULTS: After the completion of the rehabilitation program there was a significant increase of WRp, VO2p, AT and VO2/t-slope (by 30%, P=0.01; 6%, P=0.01; 10%, P=0.02; and 27%, P=0.03 respectively for continuous training and by 21%, P<0.05; 8%, P=0.01; 6%, P=NS; and 48%, P=0.02 respectively for interval training). However, only patients exercised under the continuous training regime had a significant increase in HRR1 (15.0+/-9.0 to 24.0+/-12 bpm; P=0.02) and CR (57+/-19 to 72+/-21%, P=0.02), in contrast with those assigned to interval training (HRR1: 21+/-11 to 21+/-8 bpm; P=NS and CR: 57+/-18 to 59+/-21%, P=NS). CONCLUSIONS: Both continuous and interval exercise training program improves exercise capacity in CHF patients. However, continuous rather than interval exercise training improves early HRR1, a marker of parasympathetic activity, suggesting a greater contribution to the autonomic nervous system. |
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Authors:
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Stavros Dimopoulos; Maria Anastasiou-Nana; Dimitrios Sakellariou; Stavros Drakos; Smaragdo Kapsimalakou; George Maroulidis; Petros Roditis; Ourania Papazachou; Ioannis Vogiatzis; Charis Roussos; Serafim Nanas |
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Publication Detail:
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Type: Comparative Study; Journal Article; Randomized Controlled Trial |
Journal Detail:
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Title: European journal of cardiovascular prevention and rehabilitation : official journal of the European Society of Cardiology, Working Groups on Epidemiology & Prevention and Cardiac Rehabilitation and Exercise Physiology Volume: 13 ISSN: 1741-8267 ISO Abbreviation: Eur J Cardiovasc Prev Rehabil Publication Date: 2006 Feb |
Date Detail:
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Created Date: 2006-02-01 Completed Date: 2006-06-16 Revised Date: 2007-11-15 |
Medline Journal Info:
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Nlm Unique ID: 101192000 Medline TA: Eur J Cardiovasc Prev Rehabil Country: England |
Other Details:
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Languages: eng Pagination: 67-73 Citation Subset: IM |
Affiliation:
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Pulmonary & Critical Care Medicine Department, Cardiopulmonary Exercise Testing and Rehabilitation Laboratory, Evgenidio Hospital, National and Kapodestrian University of Athens, Greece. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Aged Anaerobic Threshold Autonomic Nervous System / physiology* Exercise Therapy* Female Heart Failure / physiopathology*, rehabilitation Heart Rate / physiology* Humans Male Middle Aged Oxygen Consumption / physiology Treatment Outcome |
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