Document Type : Research Paper
Authors
1
Department of Exercise Physiology,, Faculty of Physical Education and Sport Sciences, Bu-Ali Sina University, Hamedan, Iran.
2
Department of Exercise Physiology, Faculty of Physical Education and Sport Sciences, Bu-Ali Sina University, Hamedan, Iran.
3
Department of Physical Medicine and Rehabilitation, Faculty of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran.
4
Department of Medical Biotechnology, School of Advanced Technologies in Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
10.22080/jaep.2024.26936.2175
Abstract
Objectives: Increasing aerobic capacity reduces mortality in heart patients. Exercise is highly recommended to improve Peak oxygen uptake (VO2peak) and lipid profile; however, there is limited evidence on the most effective exercise training method for coronary artery disease patients. The aim of this study was to investigate the effect of high-intensity interval training (HIIT) compared to moderate steady-state training (MISS) on improving VO2peak and lipid profile in coronary artery bypass graft (CABG) patients.
Methods: In this semi-experimental study, 40 CABG patients were randomly divided into four groups, control, HIIT of 20 seconds (80-100% of maximal aerobic power (MAP)), HIIT of 60 seconds (80-100% MAP), MISS (60-80 % MAP). The training sessions occurred three times weekly over eight weeks using a treadmill, manual ergometer, and leg ergometer, while the control group did not engage in regular physical activity. VO2peak and lipid profile were measured before and after the eight weeks.
Results: Following an 8-week intervention, VO2peak showed a 15.1% increase in the HIIT20 group (P=0.018), 18.3% in the HIIT60 group (P=0.011), and 11.6% in the MISS group (P=0.041). HDL significantly increased only in the HIIT groups (P≤0.05). LDL decreased significantly in all exercise groups (P≤0.05). TG decreased significantly in the HIIT groups (P≤0.05). TC significantly reduced in the HIIT60 and MISS groups (P≤0.05).
Conclusion: It seems that HIIT exercises perform better than MISS exercises for improving VO2peak and some lipid profile in coronary bypass patients. This better performance was associated with an equal rate of perceived exertion (RPE) and safety with MISS exercises.
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