Objective: To compare the effect of high intensity interval training (HIIT) and moderate continuous training (MCT) in patients with acute myocardial infarction (AMI) after 1 year.
Method: This study was designed as a retrospective study. A total of 28 participants who experienced AMI were recruited from March 2014. Among them, 14 subjects performed HIIT, and 14 subjects performed MCT. Both groups conducted cardiac rehabilitation (CR) exercise training for 6 to 8 weeks. Exercise tolerance test was executed to compare the effects of CR, and outcome measures were evaluated at the baseline (T0), 3 months after the baseline (T1), and 1 year after the baseline (T2).
Result: After CR, various parameters including resting heart rate (HRrest), peak metabolic equivalent (METpeak), peak oxygen uptake (VO2peak) were significantly improved over time in both group. VO2peak significantly improved from 24.20±5.03ml/kg/min at baseline to 28.90±3.54ml/kg/min at T1 (p=0.03), and 30.64±5.96ml/kg/min at T2 (p=0.001) in the HIIT group. Also, VO2peak significantly improved from 26.66±3.90ml/kg/min at baseline to 29.89±4.49ml/kg/min at T1 (p=0.035), and 28.41±3.10ml/kg/min at T2 (p=0.003) in the MCT group. And there was significant time and group interaction effect on VO2peak (F2,33=8.167, p=0.008).
Conclusion : Aerobic capacity improved after HIIT and MCT, and the effect sustained after 1 year. However, HIIT increased cardiorespiratory fitness more effectively than MCT. Therefore, HIIT is recommended for cardiac rehabilitation in patients with acute myocardial infarction. |
