ABSTRACT
People spend a large part of their life in bed during which they are not able to control their body position in an active and conscious way Chapter 1 reviewed the most important ergonomic factors affecting the quality of sleep, including physical, physiological, and psychological ergonomic parameters, and Chapter 2 focused on the underlying determinants of the physical factors: the properties of different sleep systems (mattress+support structure+ pillow) and the characteristics of different sleeping postures. In conclusion, a bed has to be appropriate for different sleeping postures and has to fulfill many requirements depending on personal needs.
