stress. Serial measurements of urinary adrenaline, noradrenaline, and 11 -hydroxycorticosteroid excretion were performed on 32 healthy men under two conditions of work stress; piecework and work on assembly line. A statistically significant increase in adrenaline, noradrenaline, and 11-hydroxycorticosteroids was observed for piecework and assembly line workers compared with salaried and 'ordinary' workers. The results support the assumption that psychosocial factors of an everyday type have significant effects on the sympathoadrenomedullary and adrenocortical function.It is well known that various stresses can lead to sympathetic overactivity. The role of the sympathetic nervous system in certain aspects of the 'stress construct' has been evaluated in a number of studies by analysing urinary adrenaline and noradrenaline excretion, as increased levels of urinary catecholamines are observed under stress-such as, physical overactivity (Raven, Conners, and Evonuk, 1970), excessive mental effort (Levi, 1972a), or high levels of industrial noise and vibration (Anitesco, 1972). However, as few studies have been concerned with the physiological and psychological effects of work stress, the current study was conducted to ascertain whether some work systems-such as, piecework and assembly line-modify sympathoadrenal and adrenocortical activity.
METHODSThirty-two male workers aged between 23 and 39 years (average 29) took part in this study. They were all apparently in good health and had normal 12-lead electrocardiograms.After they had been told about the aim and procedure of the study, all the workers agreed voluntarily to take part. They were divided into two groups according to their job: