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Shift work and disturbed sleep/wakefulness.
1IPM and Department of Public Health Sciences, Karolinska Institute, Stockholm, Sweden. torbjorn.akerstedt@ipm.ki.se
Sleep Medicine Reviews
|August 18, 2004
Summary
Shift work significantly disrupts sleep and alertness, with effects lasting even on days off. These disturbances, similar to insomnia, incur substantial human and economic costs from fatigue-related issues.
Area of Science:
- Occupational Health
- Sleep Medicine
- Chronobiology
Background:
- Shift work is prevalent globally, impacting millions of workers.
- Disruptions to circadian rhythms are a known consequence of non-standard work hours.
- Previous research indicates negative health outcomes associated with shift work.
Purpose of the Study:
- To review the acute and lingering effects of shift work on sleep and alertness.
- To explore the underlying mechanisms of these disturbances.
- To identify and evaluate strategies for mitigating the adverse impacts of shift work.
Main Methods:
- Literature review of studies on shift work, sleep, alertness, and circadian rhythms.
- Analysis of the impact of night and morning shifts on sleep patterns.
- Examination of the relationship between shift work disturbances and insomnia.
Main Results:
- Strong, acute effects on sleep and alertness observed with night and morning work.
- Lingering effects on sleep and alertness noted, extending to days off.
- Disturbance levels comparable to clinical insomnia, leading to fatigue-related accidents and reduced productivity.
Conclusions:
- Shift work profoundly disrupts sleep and alertness due to circadian system interference.
- Strategies like napping and adequate recovery can reduce, but not eliminate, these effects.
- The human and economic costs of shift work-related fatigue are considerable.