The ankle injuries, particularly sprains by inversion of this joint are the most common injuries in sports, and 41.1% of these events are identified during basketball practice. In this way, the use of ankle bracing has been suggested as a measure to prevent or minimize the incidence of these injuries in basketball players. However, questions still persist as to effect of the use ankle bracing on biomechanical variables related to the stability of the ankle, especially in situations that represent real condition of the sport. For this reason, this study aims to analyze the effect of the use of ankle bracing on dinamometric and electromyography variables of stabilizing muscles of the ankle in basketball players, during the basketball match-play simulation. Will be participate in this study experienced and competitors basketball players, healthy, with aged between 18 and 30 years. The subjects will be performed a game simulation in door, composed for four 10 minutes sets in two different situations, with and without use of ankle bracing. The test will consist of four periods of 10 minutes each, considering the mechanical and physiological demands of the game of basketball. Before beginning the test and after second and fourth sets, the will be performed the isokinetic and electromyographic assessments of the muscle groups everter and inverters in the ankle isokinetic dynamometer (System 4 Pro - Biodex ®). For this, will be performed five isokinetic maximal concentric and excentric muscle actions during ankle inversion and eversion movements at angular velocities 60°/s and 120°/s. The ground reaction forces will be acquired during all the jumps performed in basketball match-play simulation. After the acquisition and data analysis will be performed to verify the normality of data distribution and adopted the appropriate statistical analysis for comparison of variables between conditions with and without the use of ankle bracing and in each condition. Will be adopted significance level of p < 0.05. Its is expected that the use of ankle bracing can change the biomechanics variables in direction to maintain the ankle stability.
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