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dc.rights.licenseCreative Commons Attribution-NonCommercial 4.0 International License.
dc.contributor.authorKoufaki, Pelagia
dc.contributor.authorMercer, Tom
dc.contributor.authorGeorge, Keith P.
dc.contributor.authorNolan, James
dc.identifier.citationKoufaki, P., Mercer, T., George, K. & Nolan, J. (2014) Low-volume high-intensity interval training vs continuous aerobic cycling in patients with chronic heart failure: A pragmatic randomised clinical trial of feasibility and effectiveness, Journal of Rehabilitation Medicine, 46(4), pp. 348-356.
dc.descriptionPart of this work has been presented as an oral communication at 8th World Congress of Cardiac Rehabilitation and Secondary Prevention. Dublin 23-26th May, 2004.
dc.description.abstractObjectives: The health benefits of high-intensity interval training in cardiac rehabilitation warrant further research. We compared the effectiveness of low-volume high-intensity interval training vs continuous aerobic exercise training in chronic heart failure. Design/Settings: Unblinded, two arm parallel design with random assignment to exercise interventions in out-patient hospital rehabilitation gym. Methods: Patients with signs of chronic heart failure and ejection fraction < 45%, (mean age: 59.1 years (standard deviation (SD) 8.6); 3 women) completed 6 months of exercise using continuous aerobic exercise training (n = 9) or highintensity interval training (n = 8). Cardiorespiratory fitness was determined during cycle ergometry using respiratory gas exchange analysis. Functional capacity was assessed via sit-to-stand and gait speed. Quality of life was assessed using the MOS Short-Form 36 and Minnesota living with heart failure questionnaires. Cardiac autonomic regulation was assessed using Heart Rate Variability. Results: Analysis of Covariance revealed significant time effects but no group time interactions for exercise and functional capacity outcomes. Peak oxygen uptake (VO2peak) improved by a mean of 14.9% (SD 16.3%) from baseline and by 22% (SD 28.3) at ventilatory threshold in both groups. Sitto- stand (11.9 (SD 11%)) and gait speed (16.0 (SD 19%)) improved similarly in both groups. No changes in quality of life or heart rate variability were noted. Training adaptations in high-intensity interval training were achieved despite a significantly reduced time commitment and total work volume compared to continuous aerobic exercise training. Conclusion: Low-volume high-intensity interval training is a feasible and well tolerated training modality in cardiac rehabilitation settings, but is not more effective than continuous aerobic exercise training.
dc.publisherTaylor & Francis
dc.relation.ispartofJournal of Rehabilitation Medicine
dc.subjectexercise therapy
dc.subjectheart disease
dc.subjectphysical fitness
dc.subjectheart rate variability.
dc.titleLow-volume high-intensity interval training vs continuous aerobic cycling in patients with chronic heart failure: A pragmatic randomised clinical trial of feasibility and effectiveness
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qmu.authorMercer, Tom
qmu.authorKoufaki, Pelagia
qmu.centreCentre for Health, Activity and Rehabilitation Research

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