Özet:

In football, the decisive action of the game, such as sprints, occur mostly in moves of maximum, or almost maximum intensities, with relevant contribution from the anaerobic system. Thus, several authors have analyzed the anaerobic power as a major component of footballer’s physical capacity. Considering this, the present study aimed to analyze the development of anaerobic power during the preparatory period in young footballers. We evaluated 17 male athletes from Sport Club Juiz de Fora football team, ninebelonging to U-15 and eight belonging to U-17, before and after the four weeks preparatory period through RAST test (Running Anaerobic Sprint Test). The chosen anaerobic parameters were maximum power, average power and minimum power relative to body mass.On the one hand the results showed significant difference from the average and minimum power between the evaluated moments in both categories. On the other hand there was no significant increase in the results for the maximum power between the evaluated moments for the U-17, with a tendency of improvement in the U-15 category. The evidence demonstrated that athletes develop efficiency of the glycolytic system in resynthesize ATP, requiring a longer period of training and a better improvement of the exercises that use the intramuscular stores of ATP and its resynthesis by phosphagens as an energy source.

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