Avaliação isocinetica de joelho em jogadores de futebol categoria sub-20




This research was subdivided in two distinct studies: study 1 - it had as objective to compare the isokinetic parameters of evaluation of the muscle flexor (F) and extensor (E) of knee as: peak of torque (PT), total work (TW), maximum power (MP) and index of fatigue (IF), as well as analyzing the differences of these isokinetic parameters between the members right and left considering the game positions. 78 athletes of soccer had participated of this study, who had been grouped in accordance with the position in game field (goal-keepers (GO), n=7; full backs (FB), n=14; sideways (SW), n=16; midbacks (MB), n=11; midfields (MF), n=14; forwards (FO), n=16). Study 2 - the intention had to analyze the behavior of the relation of muscular balance between F and E of knee considering the PT parameters during the macrocycle of training of the season of 2001. 15 athletes of soccer who had been evaluated to the long of the season of 2001, at four distinct moments had been part of this study, M1, M2, M3 and M4, to the end of each period of mesocycle of trainings. The concentric isokinetic evaluation of muscles F and E of knee was carried through in a isokinetic dynamometer of the Cybex® mark, model Norm? 6000, following the orientation of the standardization manual, System of Test and Rehabilitation. The analysis of the data was carried through from not-parametric statistics being the express values in medium and interquartylic half-amplitude from the employee of the statistical package StatisticaTM 6.0®. The significance adopted statistics was of p<0.05. The results demonstrate that the differences between the positions of game for isokinetic parameters PT, TW, MP and IF had not been determinative for characterization of the players for position, a time that the investigated athletes had presented homogeneity in relation to the values gotten for the isokinetic parameters. How much the comparison between members right and left, the values of PT, TW, MP and IF of muscles F and E the knee in the different positions of game had been similar, what it seems to have occurred as consequence of the induced compensation for the training. Finally, the relation of muscular balance (RMB) between F and E demonstrated to be sensible the deriving modifications of the training, considering that the values of PT of the RMB of the right and left knees during the season of 2001 significantly increased (~7 % and ~6 % respectively) between the M1 and the M2, increase this that if kept until the M3 (~7% and ~6 %, respectively), even so have been evidenced a fall in the RMB of the right and left knees after the M3 of the study. These findings suggest that the work of force lead to the long of the season of 2001 was not enough to keep the raised levels of force during the competitive phase, what it indicates the necessity of maintenance of the works of same force in the competitive phase.


futebol avaliação jogadores de futebol lesões corporais joelho - musculos treinamento desportivo

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