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Background. Blood lactate [La-], heart rate (HR) and rating of perceived exertion (RPE) have been used to quantify the intensity of effort in judo. Problem and Aim. The relationship among the variables, [La-], HR and RPE after the first fight in the official competition (1-OC), one Randori (RAN), and the Special Judo Fitness Test (SJFT) have not been studied together. Therefore, the present study...