Background: Football players have different structural and physiological characteristics due to the variety of tasks that lie in this field. The main purpose of this research was to compare oxygen consumption of football players in different positions of the game.

Materials and methods: The research method was causal or post-occurrence. So nine halfbacks, seven attackers, three goalkeepers and six defenders were chosen to participate in this research.

The Chinese bicycle was used to measure Vo2max. The heart rate was determined by the electronic heart rate. Nolan Margaria-Kalamen test machine was used to measure the anaerobic power of players. Analysis of variance and F test were used to compare the mean of differences. All steps were performed using SPSS 21 at the level of 0.05.

Results: There is a significant difference between Vo2max of goalkeepers and halfbacks; between goalkeepers and attacking players; between defenders and attackers. There was a significant difference between the anaerobic capacity of halfbacks and goalkeepers; between attackers and goalkeepers.

Conclusion: The position and the duration of activity has a great effect on Vo2max and anaerobic of players. So to increase both characteristics of the players depends on the position of the game.

Key words: oxygen consumption, anaerobic consumption, football, positions of the game.