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The Scientific World Journal
Volume 2015, Article ID 192479, 8 pages
http://dx.doi.org/10.1155/2015/192479
Clinical Study

Effects of High Intensity Interval versus Moderate Continuous Training on Markers of Ventilatory and Cardiac Efficiency in Coronary Heart Disease Patients

1Amil Total Care, 22270-000 Rio de Janeiro, RJ, Brazil
2Physical Activity and Health Promotion Laboratory of Rio de Janeiro State University (LABSAU), 20550-900 Rio de Janeiro, RJ, Brazil
3Universidade Salgado de Oliveira (UNIVERSO), 24030-60 Niteroi, RJ, Brazil

Received 16 July 2014; Revised 31 December 2014; Accepted 26 January 2015

Academic Editor: Emmanuel Skalidis

Copyright © 2015 Gustavo G. Cardozo et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Background. We tested the hypothesis that high intensity interval training (HIIT) would be more effective than moderate intensity continuous training (MIT) to improve newly emerged markers of cardiorespiratory fitness in coronary heart disease (CHD) patients, as the relationship between ventilation and carbon dioxide production (VE/VCO2 slope), oxygen uptake efficiency slope (OUES), and oxygen pulse (O2P). Methods. Seventy-one patients with optimized treatment were randomly assigned into HIIT (, age = 56 ± 12 years), MIT (, age = 62 ± 12 years), or nonexercise control group (CG) (, age = 64 ± 12 years). MIT performed 30 min of continuous aerobic exercise at 70–75% of maximal heart rate (HRmax), and HIIT performed 30 min sessions split in 2 min alternate bouts at 60%/90% HRmax (3 times/week for 16 weeks). Results. No differences among groups (before versus after) were found for VE/VCO2 slope or OUES (). After training the O2P slope increased in HIIT (22%, ) but not in MIT (2%, ), while decreased in CG (−20%, ) becoming lower versus HIIT (). Conclusion. HIIT was more effective than MIT for improving O2P slope in CHD patients, while VE/VCO2 slope and OUES were similarly improved by aerobic training regimens versus controls.