Introduction: The aim of this study was to compare of body composition, anaerobic power and aerobic fitness profiles in soccer players with playing positions during competitions season. Methodology: This was a semi experimental research with three experimental groups. In this research 24 players of Pasargad soccer team; defenders (n=8, age: 25.25 years, height: 180.5cm), middles (n=8, age: 26.0 years, height: 178.0cm) and Attackers (n=8, age: 25.38 years, height: 177.75cm) were voluntary selected as statistical sample. With using In-Body system, Running-based Anaerobic Sprint Test (RAST) and Astrand Treadmill Test, body composition, anaerobic power and aerobic fitness profiles were measured in the beginning competitions season (Aban) and after the 15Th competition (Esvand) during competitions season. Finally, using Paired Sample T Test (t-student) and General Linear Model (Repeated Measures) data were analyzed. Findings: Defender, middle and attacker players showed a significant reduction in BMI during competition season (p<0.05). Such, Middle and attacker players showed a significant reduction in body Fat percent and a significant increase in aerobic fitness or VO2max (p<0.05). Further, Defender and attacker players showed a significant increase in anaerobic power during competitions season (p<0.05). Discussion and conclusion: Based on the results of performed research, body composition, anaerobic power and aerobic fitness profiles in soccer players changed during competitions season.

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