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Shift work and resident wellness

What the research shows about shift work, and how we build schedules that protect residents.

The toll of shift work

Shift work disrupts the circadian system, the internal clock that regulates sleep, hormones, metabolism, and mood. The World Health Organization's International Agency for Research on Cancer classifies night-shift work as probably carcinogenic to humans (Group 2A), with the strongest evidence for breast cancer.1 Over the long term, shift work is also associated with poorer mental health, including depression,2 and with higher rates of cardiovascular and metabolic disease.3

For physicians in training, the cost shows up in performance. In a randomized trial, interns made 36% more serious medical errors on a traditional schedule of extended shifts than on one that eliminated them, and had significantly more attentional failures.4,5 That trial studied long shifts, but a poorly sequenced shift schedule can cause similar fatigue through lost sleep and a body clock out of step with the work. Fatigue is a patient-safety problem as well as a wellness problem, which is why duty-hour limits exist.

Over time, the cost shows up as burnout, which hits emergency medicine harder than almost any other specialty. Chronic sleep loss, whether from long hours, circadian misalignment, or a punishing schedule, is an under-recognized driver of burnout, and one that is modifiable.6 Scheduling is one of the few levers a program controls directly,8 and it's what EM Scheduling is built to do.

How our scheduling protects resident wellness

The same circadian research that explains the harm also points to the fixes, and every schedule we build follows them. Attending schedules in clinician groups get the same circadian, rest, and fairness protections, with rest rules written for attendings.

Circadian-aware rotation7

Schedules rotate forward (day → evening → night) and make the return from nights to days gradual, working with the body clock's natural tendency to drift later.

Nights capped and shared7

Nights are capped and shared across the program, because a long run of nights never lets the body clock fully adjust. It just builds fatigue.

Recovery time between shifts7

Residents get enough time between shifts to recover, without quick turnarounds from one shift straight into the next.

Fair distribution

Nights, weekends, and unpopular shifts are counted and shared fairly across the program, so no one ends up with more than their share.

ACGME limits enforced4,5

Duty-hour limits exist because fatigue harms patients. We enforce them in every schedule and every resident-initiated trade, so nobody has to check by hand.

See the ACGME rules we enforce

A measured wellbeing score

Every schedule gets a wellbeing score, and each resident gets one showing how well their schedule fits their preferences and protects their sleep. Wellness is measured, not hoped for.

Scheduling that takes wellness seriously

EM Scheduling was built by ER docs, for ER docs. It builds schedules that are fair and easy on the body clock, with a wellbeing score on every one. See how it works for your program.

Scheduling an attending group? See clinician pricing

References

  1. 1.International Agency for Research on Cancer (WHO). Night Shift Work. IARC Monographs on the Identification of Carcinogenic Hazards to Humans, Volume 124 (2019). https://www.iarc.who.int/news-events/iarc-monographs-volume-124-night-shift-work/
  2. 2.Shift Work and Poor Mental Health: A Meta-Analysis of Longitudinal Studies. American Journal of Public Health, 2019;109(11). https://ajph.aphapublications.org/doi/10.2105/AJPH.2019.305278
  3. 3.Xi J, et al. Association between night shift work and cardiovascular disease: a systematic review and dose-response meta-analysis. Frontiers in Public Health, 2025;13:1668848. https://pmc.ncbi.nlm.nih.gov/articles/PMC12506678/
  4. 4.Landrigan CP, et al. Effect of Reducing Interns’ Work Hours on Serious Medical Errors in Intensive Care Units. New England Journal of Medicine, 2004;351:1838–1848. https://www.nejm.org/doi/full/10.1056/NEJMoa041406
  5. 5.Lockley SW, et al. Effect of Reducing Interns’ Weekly Work Hours on Sleep and Attentional Failures. New England Journal of Medicine, 2004;351:1829–1837. https://www.nejm.org/doi/full/10.1056/NEJMoa041404
  6. 6.Sleep, Fatigue, and Burnout Among Physicians: An American Academy of Sleep Medicine Position Statement. Journal of Clinical Sleep Medicine, 2020. https://jcsm.aasm.org/doi/10.5664/jcsm.8408
  7. 7.American College of Emergency Physicians. Circadian Rhythms and Shift Work (Policy Resource and Education Paper). https://www.acep.org/siteassets/new-pdfs/preps/circadian-rhythms-and-shift-work---prep.pdf
  8. 8.Eskander J, et al. Evaluating Wellness Interventions for Resident Physicians: A Systematic Review. Journal of Graduate Medical Education, 2021;13(1):58–69. https://pmc.ncbi.nlm.nih.gov/articles/PMC7901639/

This page is for general education and does not constitute medical advice. External links are provided for reference; we don't control and aren't responsible for their content.

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