ABSTRACT
The sleep-wake cycle and body rhythms of shiftworkers may be disrupted. Furthermore, shiftworkers live at least partly disconnected from their social environment. Therefore, the individual shiftworkers problems can range from disturbed sleep to impaired well-being, health and performance, as well as to impoverished family and social life. As a consequence, their employers may be faced with increased labor turnover and absenteeism, as well as reduced safety and productivity. Therefore it is necessary to seek solutions to reduce these problems.
