[Studies on the strain on drivers during high-speed driving].

In modern industrial countries the technological progress has shifted the occupational stress to the psychomental sphere. In the course of this alteration the number of work places with driving, controlling, and monitoring increased considerably. On 10 engine-drivers during high-speed driving from 210 to 250 km/h heart rate and electrocardiogram were monitored continuously. The blood pressure was measured intermittently. The elimination rate of catecholamines in urine, and the levels of cyclic AMP and catechol-O-methyltransferase in plasma were determined in reference to the trial to quantify the psychomental strain by biochemical parameters. In consequence of the individual affective conditions of the engine-drivers it has been attempted to scale the subjective strain.