Combination of aerobic and resistance exercise is considered an effective strategy to deal with overweight and obesity. Therefore, the aim of the present study was to investigate the effect of two different patterns of in-session concurrent aerobic and resistance exercise on body composition and physical fitness in overweight young men. Exercise training p which included resistance and aerobic exercise with different in-session patterns. The subjects included 24 young overweight men who were randomly assigned to two equal groups (n=12): sequential exercise and combined exercise groups. The groups trained 3 sessions per week for six weeks. Subjects in the sequential exercise group did the all the resistance exercises and then did aerobic exercise. In the combined exercise group, subject performed aerobic exercise between the resistance exercises. Body composition (body mass index, waist-to-hip ratio (WHR), body fat percentage and fat-free mass) and physical fitness (VO2max, upper body endurance; upper and lower body strength) were assessed at the beginning and end of the study. Both sequential and combined exercise training patterns significantly improved body composition indices, but WHR, and physical fitness measures (P<0.05). Nevertheless, no significant difference was observed between the two the patterns in terms of the impact on measured variables (P>0.05). Based on the results of the current research, both patterns (sequential and combined) are effective in improving body composition and physical fitness. These findings could be helpful in diversifying the concurrent training for optimal weight management and improving physical fitness in overweight and obese people.