Shift Work and Health: The Questions People Actually Ask
Shift Work and Health: straight answers to the questions people actually ask, with the figures behind them.
The health effects of working outside standard daytime hours.
Key takeaways
- Associated with: raised cardiovascular and metabolic risk over the long term
- Useful pre-shift nap: 20-30 minutes
- Most useful single change: Wear dark glasses travelling home after a night shift.
- Commonest mistake: Driving while fighting to stay awake.
- See a doctor if any of the signs under "When to speak to a doctor" below apply to you.
What is Shift Work and Health?
The health effects of working outside standard daytime hours.
Why does it matter?
It disrupts the circadian system in ways no amount of discipline changes, and long-term shift work carries measurable metabolic and cardiovascular risk.
Associated with for Shift Work and Health?
Raised cardiovascular and metabolic risk over the long term.
Useful pre-shift nap for Shift Work and Health?
20-30 minutes.
Anchor sleep for Shift Work and Health?
Around 4 hours at a fixed clock time.
Highest-risk moment for Shift Work and Health?
The drive home after a night shift.
What is the single most useful thing to do?
Wear dark glasses travelling home after a night shift.
What is the most common mistake?
Driving while fighting to stay awake.
When should I see a doctor?
See a GP for persistent sleepiness despite adequate opportunity to sleep, or if you fall asleep involuntarily. In the UK you must inform the DVLA of any condition causing excessive daytime sleepiness. Report safety-critical sleepiness to your employer; do not drive when sleepy.
Where to go next
- What People Get Wrong About Shift Work and Health
- The First Steps With Shift Work and Health
- Shift Work and Health — the reference entry
- What the Guidance Really Says About Sitting at Work
- Workplace First Aid: Sorting the Evidence From the Noise
When to speak to a doctor
See a GP for persistent sleepiness despite adequate opportunity to sleep, or if you fall asleep involuntarily. In the UK you must inform the DVLA of any condition causing excessive daytime sleepiness. Report safety-critical sleepiness to your employer; do not drive when sleepy.
Where this comes from
- Health and Safety Executive — managing shift work
- The Sleep Charity — shift work
How this page was put together
Every figure, recommendation and warning above is taken from the guidance named in Where this comes from. Nothing on this page is inferred, summarised or generalised beyond what those bodies publish: where they give a number, it is their number, and where they are silent, so are we. Pages are rebuilt whenever the underlying record changes. Sign-off by a named clinician, where it has happened, is shown at the top of the page along with the date.
Medical disclaimer
This article is general information, not medical advice. It cannot account for your own history, medication or circumstances. Always speak to a GP, pharmacist or another qualified health professional before making changes that affect your treatment, and never delay seeking medical advice because of something you have read here. In an emergency, call 999.
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