The article discusses the transformations undergone by the working time in recent decades, considering its three dimensions: duration, flexibility and strength. The first two, concrete and measurable and therefore more visible to society are often discussed, negotiated and legislated. On the other hand, the focus of this study the dimension of intensity is less evident. In a context which the several organizational and managerial devices have as purpose and consequence the intensification of working time, analyzing this issue is of fundamental importance to understand work. For this purpose, this study is supported by bibliographical analysis articulated to the results of the "European Survey on Working Conditions" and has as a starting point the discussion of questions such as: What does the intensity of working time mean? How does this intensity manifest itself? What are its causes and determinations? Why is intensity practically absent from the debate.
Working Time; Work Organization; Intensification; Working Hours; Health