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This study attempted to identify work and leisure-time conditions and life-style factors associated with excess metabolic levels (metabolic demands exceeding one-third of a person's aerobic capacity) at work among men and women.The study focused upon psychological, ergonomic, and physically loading factors and chemical and physical environmental conditions. Data were obtained through self-reports, interviews, workplace analyses, technical measurements, and observations. Gender-specific calculations were used in univariate analyses and in stepwise logistic regression models for excess metabolic level.Twenty-seven percent of the men and twenty-two percent of the women worked at an excess metabolic level during their workday. Awkward work postures, heavy manual materials handling, high circulatory strain, chemical exposures, noise levels, much routine work, and many obstacles to job performance characterized their work conditions. The women had low skill discretion and more often atypical workhours, while the men showed high circulatory strain during leisure-time activities. Important negative life-style factors were a high consumption of alcohol for the men and a high body mass index and no or little regular physical exercise for the women.Metabolic demands in worklife today remain high. The women who exceeded the recommended metabolic level at work in this study were characterized by low pay, poor health, and children at home, in addition to high physical load and psychosocial strain at work. These characteristics indicate a group with few possibilities to leave a hazardous job for a less physically demanding one. The men who worked at an excess metabolic level seemed to be characterized more by a life-style common in some male-dominated work cultures with monotonous work.

The hypothesis to be tested was whether characteristics of work situations affect the physiology of people when the effects of individual differences in medical/behavioral factors are minimized. Four prisons with different objective work conditions were chosen. The psychosocial work situation was recorded in a self-administered questionnaire. Morning plasma cortisol, blood pressure, and urinary excretion of catecholamines were measured. Analyses of variance showed that the four prisons differed significantly as to mean levels of decision latitude and skill discretion. Analyses of variance also showed significant differences between the prisons with regard to mean levels of noradrenaline at night during leisure time and a tendency towards differences in work time. The rank order of mean levels of noradrenaline in the four prisons was the same as the inverted rank order of mean levels in self-reported work conditions. Thus it seems that when collective data are used and when adjusted for other variables which might have an association with the dependent variables, differences in self-reported work conditions are reflected in the urinary excretion of noradrenaline. Of the three physiological variables used as dependent variables, urinary excretion of noradrenaline reflected arousal as an effect of work conditions more accurately than the other variables.