Bright Light in Work-Sleep Schedules for Shift Workers: Application of Circadian Rhythm Principles
Basic research on human circadian rhythms has revealed principles that could be applied to many practical problems such as shift work. Although the problems associated with shift work have been extensively documented and also studied in laboratory simulations [1, 15, 16, 18, 28, 31], there have been few major work-site interventions based on circadian principles [6, 29]. About 20% of the people in industrialized countries are engaged in shift work. Their major complaint is of sleep disturbances, especially in connection with the night shift, but also to some extent with morning work. Sleep after the night shift is short (4–6 hrs) and of poor quality. Other common complaints are persisting fatigue, impaired performance at work, and gastrointestinal difficulties.
Unable to display preview. Download preview PDF.