Abstract
The aim of this study is to investigate changes in cardiovascular activity associated with a high mental workload. The reported experiments, carried out in naturalistic settings, point to information load and information processing under time pressure as main risk factors. This kind of occupational stress had to be dealt with by two of the three groups under investigation: brokers and simultaneous interpreters; it was not experienced by lecturing university professors. The pattern of cardiovascular activity of the two former groups consisted of overmobilization of cardiovascular activity at the beginning of work, and only partial normalization of task-evoked changes in cardiovascular activity at the end of work. Substantial elevations of diastolic blood pressure and tachycardia, which followed earlier overmobilization, resemble a miniature copy of changes seen in the development of cardiovascular diseases.
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