Why Sleep Matters for Doctors

Sleep deprivation degrades clinical performance in measurable ways: reduced reaction time, impaired decision-making, decreased empathy and increased error rates. After 24 hours without sleep, cognitive performance is equivalent to a blood alcohol level above the legal driving limit in most countries.

Sleep Hygiene for Shift Workers

  • Consistent anchor sleep: Even on variable schedules, try to maintain a consistent main sleep period
  • Temperature: Sleep in a cool room (18–20°C / 64–68°F) — body temperature must fall to initiate sleep
  • Darkness: Complete darkness. Blackout curtains are one of the highest-return investments for a junior doctor.
  • Noise: Earplugs or white noise to mask daytime environmental noise
  • No screens 30–60 minutes before sleep: Blue light suppresses melatonin. If unavoidable, use night mode.
  • Caffeine cut-off: No caffeine within 6–8 hours of planned sleep time
  • Alcohol: Avoidance improves sleep quality — alcohol fragments sleep and reduces restorative REM

The Two-Process Model of Sleep

Sleep is regulated by two processes:

  • Process S (Sleep pressure / homeostatic): Adenosine builds in the brain during wakefulness and drives sleep need. Caffeine works by blocking adenosine receptors.
  • Process C (Circadian): Your internal clock promotes alertness during the day and sleep at night. Shift work fights this process — the physiology is not fixable with willpower.

Strategic Napping

  • 20-minute nap: Restores alertness without sleep inertia (grogginess on waking). Ideal on night shift rest breaks.
  • 90-minute nap: Completes a full sleep cycle — useful before night shifts or when building up sleep debt.
  • Avoid napping after 3pm if you need to sleep at a normal bedtime — it reduces sleep pressure.

When Sleep is a Problem

If you are having persistent difficulty sleeping (insomnia) beyond shift pattern adjustment:

  • Cognitive Behavioural Therapy for Insomnia (CBT-I) is the most effective long-term treatment — more effective than medication
  • Apps: Sleepio (evidence-based CBT-I); available free for some NHS staff
  • See your GP if sleep difficulties are affecting your daily functioning
  • Avoid benzodiazepines or Z-drugs as a first-line solution — tolerance develops rapidly