Introduction:The main aim of this study was to investigate the effect of aerobic exercise with two different intensities on body composition, aerobic capacity, and salivary hormones of overweight men.Materials and Methods: 35 overweight male volunteers (mean age 31.3 ± 3.3 years, height 170.5 ± 4, weight 77.42 ± 6.2) were randomly divided into three groups of high-intensity aerobic exercise (HIAT, 12 people) and low-intensity exercise. (LIAT, n=12) and control group (CG, n=11). Body composition (WHR, BMI, fat percentage, lean body mass), VO2 max, salivary cortisol, testosterone, and lactate dehydrogenase were evaluated before and after the 8-week training program. Paired t-test and ANOVA were used for statistical analysis (P<0.05).Results: The results of this study showed that high-intensity aerobic training significantly decreased weight, BMI, and fat percentage and increased cortisol and lactate dehydrogenase hormones in this training group. Low-intensity aerobic exercise led to an increase in testosterone (P<0.05).Conclusion: The results of our research revealed that high-intensity aerobic exercise induces weight loss, enhances body composition, and elevates cortisol and lactate dehydrogenase hormones in overweight men. while low-intensity aerobic exercise increases testosterone levels. Manuscript profile