Document Type : Original article
Authors
1
Department of Sports Biomechanics and Injury, Faculty of Physical Education and Sport Sciences, Kharazmi University, Tehran, Iran
2
Full Professor of Sport Biomechanics, Department of Sport Biomechanics and Sport Injuries, Faculty of Physical Education and Sport Science, Kharazmi University, Tehran, Iran. Full Professor of Sport Biomechanics, Research Institute
10.22037/sjrm.2025.117426.3347
Abstract
Introduction and Objective: Considering the claimed impact of regular physical exercise on heart performance, this study aimed to investigate the effect of an aerobic exercise program on selected hematologic, hemodynamic, and biomechanical variables related to the heart muscle performance in middle-aged men with heart conditions.
Methodology: In this semi-experimental study, 34 middle-aged male cardiac patients aged 40 to 65 years who had suffered from myocardial infarction . coronary artery bypass graft (CABG), or percutaneous coronary intervention participated. They were non-randomly selected and randomly divided equally into experimental and control groups. The experimental group underwent submaximal aerobic exercises three times a week for eight weeks. Descriptive statistics including mean and standard deviation were used to describe the data. The Kolmogorov-Smirnov test was employed to check for the normal distribution, and the Levene test was used to determine the homogeneity of variances among groups. Inferential statistics such as analysis of covariance (ANCOVA), paired t-test, and Wilcoxon test were used to compare intra-group and inter-group data collected before and after the test in both the experimental and control groups at a significance level of p ≤ 0.05.
Results: The results showed a significant increase in hematologic variables (white blood cells, erythrocyte sedimentation rate ، hematocrit, and lipoproteins), hemodynamic variables (stroke volume, resting heart rate, and diastolic blood pressure), and biomechanical variables of heart function (ejection fraction, dimensions, and volume of heart chambers) following the rehabilitation program (aerobic exercise).
Conclusion: Based on the results and the impact of aerobic exercises on various blood variables, the exercise protocol used in this study can be recommended to improve hematologic, hemodynamic, and biomechanical function of the heart muscle in cardiac patients.
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