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

1972

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 kestävyysh…

1971

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

1972

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

1972

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…