Subjective wellbeing and temporal patterns of sympathetic-adrenal medullary activity.

Sixteen male subjects performed an audiovisual-conflict during 1 h of an ordinary day of work. Adrenaline and noradrenaline excretion and subjective reactions were measured before, during, and after the test period as well as at corresponding points in time in a control day of ordinary work with interruption. This program was carried out on two occasions, which were expected to differ with respect to the subjects' general mental condition and wellbeing. There were large intraindividual as well as interindividual variations in the rate at which adrenaline output decreased after the stress period. The results support the hypothesis that rapid recovery to baseline levels is positively related to a relaxed, alert and subjectively pleasant state of mind.