:: Volume 24, Issue 1 (5-2022) ::
2022, 24(1): 24-33 Back to browse issues page
Effect of Different Volumes of High-intensity Interval Trainingon Serum Troponin I and Creatine KinaseMB Levels in Patients After Myocardial Infarction
Z Delfani , F Shahidi , M Kashef , Mehrdad Namdari
Department of Sport Physiology, Facultyof Physical Education and Sport Sciences, Shahid Rajaee Teacher Training University, Tehran, Iran. , venus_delfani@yahoo.com
Abstract:   (837 Views)
Introduction: Serum levels of cardiac troponin (CTnI) and creatine kinase (CK-MB) are two indicators of cardiac cell damage. The present study aimedto investigate the effect of different volumes of a high-intensity interval training (HIIT) course on serum CTnI and CK-MB levels in cardiac patients after myocardial infarction (MI). Materials and Methods: In this semi-experimental study with pretest–posttest design, thirty patients (50.03±4.32 years) with documented MI were selected voluntarily. Regarding the researchcriteria, all participants were randomly assigned into three groups (n=10 per group): Acontrol group and two high-volume HIIT training (HV-HIIT) and low-volume HIIT training (LV-HIIT)groups.The HV-HIIT group did exercisesthree days a week for 40 minutes, and the LV-HIIT group didexercises three days a week for 20 minutes.Blood samples were taken before and after the 12-week intervention. Statistical analysis of the variables was performedusingpaired t-tests, one-way analysis of variance, and Tukey's post hoc test. Results: At the end of the intervention, CTnI in the LV-HIIT and HV-HIIT groups decreased significantly (70% and 50%, respectively); however, no significant change was observed in the control group. CK-MB levels showed a significant decrease (26%)only in the LV-HIIT group. In the serum levels of CTnI, a significant difference was observed amongthe three groups (p=0.035), and the results of Tukey's post hoc test showed a significant difference between the control and LV-HIIT groupsin terms ofdecreasedCTnI levels(p=0.012). Conclusion: LV-HIIT training as an exercise strategy for cardiac rehabilitation programs after MI can improve cardiac injury indices more effectively than HV-HIIT and is associated with less cardiac damage and fatigue.

Keywords: Myocardial infarction, Cardiac damage indicators, High-volume HIIT, Low-volume HIIT
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Type of Study: Original | Subject: Cardiology
Received: 2022/05/30 | Accepted: 2022/09/21 | Published: 2022/05/2

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Volume 24, Issue 1 (5-2022) Back to browse issues page