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…

Liikkeen kinemaattisista ominaispiirteistä, niiden psykofyysisistä selitysyhteyksistä ja näiden muutoksista psykomotorisen kuormituksen ja kestävyysharjoittelun vaikutuksesta = On the kinematic characteristics and psychophysical correlates of a human movement and their changes during psychomotor loading and endurance conditioning

Urinary excretion of catecholamines, 17-hydroxycorticosteroids and concentration of certain blood parameters during progressive endurance conditioning

The urinary excretion of noradrenaline and adrenaline, 17-0HCS, the concentration of hemoglobin, hematocrite, the concentration of plasma lactic acid, K⁺, Na⁺ and blood glucose, in 22 male students were determined both before and after a periodic, submaximal exercise on a bicycle ergometer. The measurements were repeated three tinies during a nine-week endurance conditioning where eleven of tile subjects participated. Except for the decreased heart rate during exercise (p < .001) and increased VO₂ max. (p < .001) the endurance conditioning resulted in a significantly decreased concentration of the average plasma lactic acid in the trained subjects during the most anaerobic phases of exercis…

Kestävyysharjoittelun vaikutukset eräisiin biokemiallis-fysiologisiin muuttujiin tietyissä psykofyysisissä kuormitustilanteissa

During a twelve week period the effects of a controlled program of progressive endurance training on 30 healthy young conscripts were studied during five different psychophysical loading situations. The control group (10 Ss) were trained by a supposed mock load and therefore had a steady state heart rate of about 90 per minute during training on a bicycle ergometer. The other two groups (10 + 10 Ss) pedalled four days a week, thirty minutes at a time and had a heart rat; of about 140 and 160 per minute, respectively. With some loss of samples the urinary excretion of noradrenaline, adrenaline and 17-hydroxycorticosteroids, the concentration of plasma lactic acid, potassium sodium and the bl…