[Influence of sauna baths on urinary excretion of catecholamines].

The urinary excretion of noradrenaline, adrenaline and creatinine has been studied in 22 normal young men during a sauna bath (20 minutes). The radio noradrenalinuria/creatinine is specifically increased, indicating a stimulation of the orthosympathetic system (19.6 ng.mg-1 +/- 7.9 in basal state; 30.5 +/- 15.7 in sauna bath).