Comparison of the Effects of Two Types of Acute Continuous and Intermittent Aerobic Exercises on Serum Brain Natriuretic Peptide Concentration and Myocardial Workload in Sedentary Men

Document Type : Original Article


1 MSc of Exercise Physiology.Department of Exercise Physiology, Faculty of Sport Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran.

2 Assistant Professor of Exercise Physiology.Department of Exercise Physiology, Faculty of Sport Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran.

3 Associate Professor of Sport Science.Department of Sport Science, Faculty of Literature and Humanities, Jahrom University, Jahrom, Iran.


Background and Objective: Studies have shown that acute exercise can increase serum concentrations of cardiac biomarkers, including brain natriuretic peptide (BNP). The aim of this study was to compare of the effects of two types of acute continuous (CE) and intermittent aerobic exercises (IE) on serum BNP concentration and myocardial workload in sedentary men.
Subjects and Methods: Eleven sedentary healthy men aged 22.3±1.9 years completed this semi-experimental study. The study was designed as a crossover trial performed on two distinct experimental days separated by a 1-week washout period. Each session consisted of 40 min of aerobic exercise, either IE (60% of reserve heart rate) or CE (intensity alternating between 50% for 2 min and 80% for 1 min), on a treadmill. Measurement of variables were taken before and immediately after each exercise session.
Results: Serum BNP concentration changes after both types of exercises was not significant (P>0.05) and there was no significant difference in BNP concentration between CE and IE (P=0.21). In addition, myocardial workload increased significantly following both exercise protocols (P=0.001) but there was no significant difference between CE and IE values (P=0.2).
Conclusion: According to the results of this study, there was no difference between intermittent and continuous exercises on serum BNP concentration and both types of exercises imposed the same myocardial workload. Increase in BNP was lower than the upper reference limit for ventricular dysfunction.


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