Effects of simulated repetitive work on urinary catecholamine excretion

Abstract
An experimental study was conducted to investigate the effects of short-cycle repetitive work on catecholamine excretion rates. The effects of payment method and pacing requirement were considered. The data showed significant effects of these independent variables and of time of day on adrenaline and noradrenaline excretion. These three factors interacted in producing their effects. Suggestions are made as to the psychological and physical mechanisms underpinning these effects.