Abstract des Autors

Seven elite, male kayakers carried out a 40 s arm cranking exercise performed twice - in October, and again after 5 months of training, in April. Significant elevations in plasma uric acid (UA) concentration was found in response to 40 s arm cranking (to 0.490 and 0.336 mmol/l, respectively) on both occasions. However, the post-training basal and post-exercise plasma UA levels were lower than before the training (by 0.059, 0.050 and 0.154 mmol/l at rest, 3 min and 30 min after the exercise, respectively). The pre-training (but not the post-training), post-exercise plasma UA concentrations were significantly correlated with peak power, total work output and peak lactate levels (r=0.911, 0.958 and 0.848, respectively). The training of elite kayakers probably led to a lower adenine nucleotide involvement in energy metabolism. Despite that, total work output and postexercise lactate concentration increased significantly, indicating a greater dependence of working muscle on the glycolytic pathway. Moreover, the post-training disturbances in the blood acid-base equilibrium were smaller than before the trainig despite higher lactate concentrations, thus indicating a better tolerance to the post-exercise acidosis. Verf.-Referat