Abstract

Exercise-induced changes in plasma levels of testosterone, androstenedione, cortisol and LH in judo and kayak athletes were studied. Test exercises of maximum intensity, characteristic for the sport disciplines studied, were used: a 5 min pulsative cycloergometer test and a 4 min kayak ergometer test for judokas and kayakers, respectively. The tests were performed in different phases of annual training cycles, which were of different structures in the two sports. Also the workloads were different: in judokas the strength/anaerobic component of the training was essential, while in kayakers aerobic work predominated. The postexercise increases in plasma testosterone diminished towards the end of the training cycle. During the training cycle, resting and exercise-induced levels of androstenedione diminished in kayakers, and remained unchanged in judokas. LH-levels were not affected either by exercise or by the phase of the training cycle. Verf.-Referat