The Karasek Job Content Questionnaire includes 2 dimensions: the psychological demands at work, and the latitude decision. The combination of these two characteristics explains the degree of exposure of a worker to stress. Indeed, a worker is under pressure (job-strain) when workload is important and autonomy is poor. The Sumer study was conducted in France on 25,000 employees and classified occupations taking into account psychological demands and latitude decision of occupations. No publication on emergency physicians' responses to Karasek questionnaire is referenced, even though theirs exposures to burnout is known. A preliminary study on 19 emergency physicians of the CHU of Clermont-Ferrand illustrates concretely this "extraordinary situation", with the lowest decision latitude and the highest psychological demands ever recorded. Moreover, there are no data on results at the Karasek questionnaire under different conditions within the same participant, i.e. responses to the Karasek questionnaire is supposed similar and reflect a constant perception of work. Additionally, several biomarkers of stress have been proposed, in particular DHEAS due to its long half-life of 16 hours. To our knowledge, the relationship between biomarkers of stress and tension at work with Karasek model has never been studied, like this relations with other wellness questionnaires. Comparisons between emergency health care workers are also lacking.