Maximum volume identification of oxygen by the multistage fitness test (yo-yo) in sub-14 category soccer players of Grêmio foot-ball Porto Alegrense
Abstract
In controlled trainings to quantify and to identify the alterations of VO2máx in athletes of the Category Sub-14 of the Grêmio Foot-Ball Porto Alegrense. Methods: The sample was composed by 20 athletes, with average of 14 year-old and 4 months ± 3. Medium stature of 170.17 ± 8.16cm; body mass average of 61.64 ± 6.66Kg.They were submitted to training of 40 weeks that was characterized by specific works of soccer that was include the four energy systems: aerobic potency, aerobic endurance, anaerobic potency and anaerobic resistance; During the training period the athletes were submitted to three indirect evaluations of VO2máx through Multistage Fitness test (YoYo), in an interval of three months between one and other gauging. Results: The medium values of VO2máx found among the three evaluations of the group they were: in first 51.84 on second 55.39 and in third 57.29mL.kg-1.min-1. Discussion: The results of this study indicated that the test of YoYo presented considerable increase of VO2máx in the players among the three evaluations accomplished in the group, besides, the obtained results were inside of the normal values, based on studies already accomplished. Conclusion: we can affirm that work anaerobic contribute to the increase of the athletes' VO2máx in the measure in that these produce cardiovascular adaptations and consequently an increase in the maximum consumption of oxygen and it was also Inferred the importance of the tests of indirect measure, because they supply information that aid in the prescription of exercises.
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