Introduction: The fluids imbalance caused by sweating during exercise can alter the physical ability and perceived exertion impairing athletic performance Objective: To verify the presence ofdehydration and to evaluate the athletes performance by testing different forms of oral rehydration. Materials and Methods: Ten judokas, eight males and two females, have held four training sessions with different forms of hydration, free water intake (AL) intake of sports drink free (GL), controlled intake of water (AC) and controlled intake of sports drink (GC). The hydration status was determined by analysis of urinary staining and percentage of weight loss and the level of performance through the test of arm strength. Results: Based on the coloratio...