Urinary excretion of catecholamines during a psychomotor choice eaction test before and after physical conditioning

Urinary excretion of noradrenaline and adrenaline and the performance of 12 volunteer male students were determined during a highly motivated competition in a 45 minute psychomotor choice reaction test. The measurements were repeated after a nine-week period of regular endurance conditioning with 6 of the subjects. In comparison with the control situations the urinary excretion of catecholamines increased significantly in both measurements (p < .001). The prevalence of mental tension reflected in a significantly decreased ratio of noradrenaline to adrenaline (p < .05 - .01). No significant adaptation was found. A tendency was found in the high excretion group having less errors during the C…