Abstract
Adrenaline, noradrenaline and 3-methoxy-4-hydroxymandelic acid (VMA) in urine were measured on human male subjects sitting on chair and lying on bed awake for several hours, in order to investigate the effects of these postures on catecholamine excretion in men.
Adrenaline excretion decreased at first but significantly increased 3 to 4 hours after. Noradrenaline excretion decreased at the period of adrenaline peak. VMA level showed a gradual decrease. These changes were observed in both postures but not in their usual lives. Most of subjects complained of strains caused by sitting on chair or resting on bed keeping awake for hours.
As many authors have reported the elevated level of urinary catecholamines in mental or emotional stresses, it was supposed that our subjects could not maintain themselves without stress in one posture for many hours.
