Stop filing fatigue under "wellness"
Walk a typical agency wall. Fatigue lives on EAP posters and “self-care” emails. Overtime, court holdovers, and secondary employment live in operations.
That split is the mistake. Aviation and trucking regulate duty hours because impairment is a systems control issue. Policing mostly treats the same physiology as personal resilience. The result is predictable: command tracks the duty roster while the human system that has to decide under load runs on coffee and residual adrenaline.
Shift Change’s running argument has always been that hours logged are not the same as readiness. Work hours are not the same as capability either. Filing sleep under wellness while the schedule is designed in ops is how agencies ignore the levers that already have evidence.
The BAC translation every supervisor understands
In 1997, Dawson and Reid published a short Nature correspondence that still does more supervisory work than most wellness decks. Forty adults completed an unpredictable tracking task under two conditions: sustained wakefulness, and alcohol dosing to a mean blood alcohol concentration of 0.10%. Performance fell about 0.74% per hour of wakefulness between hours 10 and 26. Each hour of wakefulness mapped to roughly 0.004% BAC equivalence on that task. Put the familiar numbers on it: 17 hours awake matched about 0.05% BAC; 24 hours awake matched about 0.10% BAC (Dawson & Reid, 1997).
Say what that is—and what it is not. It is comparable impairment magnitude on a psychomotor tracking task. It is not a claim that a tired officer is legally intoxicated, and it is not a substitute for a breathalyzer. Lab tracking is not a use-of-force decision, a radio call, or a pursuit.
Even with that scope locked, the policy implication is blunt. If tracking and reaction degrade on that scale after a long stretch awake, treating a 16-hour day as “just hustle” is not toughness. It is ignoring a known impairment pathway while regulating the alcohol version of the same performance drop.
What "tired" looks like in a police dataset
Lab classics persuade. Agency baselines force the conversation onto the roster.
James, James, and Atherley’s Seattle Police Department fatigue study—published in the Journal of Experimental Criminology and reported in full for NIJ (OJP 309959)—opened with a baseline survey of about 319 complete responses. 77.4% reported poor sleep quality. 25.7% met criteria for excessive daytime sleepiness. 50.2% screened in the PTSD-symptom range, 51.9% in the depressive range, and 40.8% in the anxiety range. Night-shift employees looked worse on sleep quality and sleepiness and were more likely to report falling asleep driving home (James, James, & Atherley, 2024).
Read that as a majority pattern in a major-department sample—not a few soft officers who need a mindfulness app. Also read the context limits honestly: the work ran during COVID and an SPD staffing crisis, and the sample mixed civilian and sworn personnel. Those limits matter for generalization. They do not erase the controlled comparison that followed, and they do not make 77% poor sleep quality something command can file under “individual lifestyle.”
Training works—but it’s not a nap lecture
Seattle did not stop at a baseline. Researchers ran a randomized fatigue risk-management intervention: eight weeks of roughly 15-minute online modules plus at-home actions. About 237 employees participated in the experiment (James, James, & Atherley, 2024).
Actigraphy—objective sleep measurement—showed the treatment group gained about 18 minutes of sleep per 24 hours while the control group lost about 9 minutes (group × time, p < .001). Treatment participants reached roughly 7 hours of sleep on average. Day-shift participants gained about 34 minutes.
Safety behavior moved too. Reported falling asleep while driving dropped from 20% to 11% in the treatment group, while the control group stayed essentially flat at 15% to 16% (p < .01). Mental-health scales moved with treatment as secondary gains: PHQ-9 from 7 to 5 (treatment) versus 7 to 8 (control); GAD-7 from 6 to 4 versus remaining at 6; PCL-5 from 34 to 16 in treatment. Quality of life did not change significantly—honesty that should raise trust in the rest of the result set (James, James, & Atherley, 2024).
Hold the boundary. This was waitlist-controlled fatigue training, not a schedule redesign trial. Seattle moved sleep minutes and drowsy-driving reports. It did not rewrite overtime policy. Supervisors who treat training as a substitute for roster discipline are buying half a lever and calling it a fix.
Schedules are tactics
The second lever is structural. Amendola and colleagues ran a randomized shift-length experiment in Arlington, Texas, and Detroit, Michigan, assigning officers to 8-, 10-, or 12-hour shifts (Amendola et al., 2011/2012).
On sleep and overtime, 10-hour shifts beat 8-hour shifts on the outcomes that matter for readiness math. Officers on 10s averaged 7.86 hours of sleep versus 7.27 hours on 8s. Practitioner summaries of that gap put it at roughly 185 more hours of sleep per year. Overtime per two weeks told a harsher story for traditional 8s: 5.75 hours of OT on 8-hour shifts versus 0.97 hours on 10s and 1.89 hours on 12s—more than five times the OT of the 10-hour condition. Quality of work life was also higher on 10s than on 8s (Amendola et al., 2011/2012).
Precision matters: this study did not show significant wins on many performance and safety simulations—driving, shooting, or self-initiated activity. The evidenced gains are sleep, overtime, quality of work life, and the alertness profile below—not marksmanship or simulator driving scores. If a wellness budget cannot touch the roster, it is not addressing the lever Amendola tested.
Why 12s feel popular and still cost alertness
Twelve-hour blocks feel like a win because of the days off. Preference is real. Alertness cost is also real.
In the same Amendola trial, officers on 12-hour shifts showed higher sleepiness and lower alertness than officers on 8-hour shifts. Their overtime (1.89 hours per two weeks) was still higher than the 10-hour condition (0.97 hours), even if both compressed schedules beat 8s on OT (Amendola et al., 2011/2012).
Popularity is not performance. Extra recovery days do not cancel the on-duty sleepiness and alertness penalties the RCT measured. Agencies that adopt 12s for morale without monitoring sleepiness, alertness, and total hours—including holdovers—are optimizing for calendar preference, not for the human system that has to stay sharp at hour eleven.
OT and side jobs: the hidden second roster
The duty roster is not the full workday. Court, holdovers, and off-duty security load the same physiology as “on the clock.”
The National Policing Institute’s InFocus synthesis on shift work, fatigue, and overtime frames the operational problem and the practice response: treat fatigue as a public-safety issue; set maximum daily and weekly hours; protect minimum rest between shifts; and count secondary employment inside those caps. Expert guidance cited in that synthesis commonly lands around roughly 12 hours per day and 60 hours per week as upper bounds before risk rises sharply (National Policing Institute, InFocus). Use that as practice guidance and synthesis—not as primary causal proof on its own. The causal spine for this article remains Dawson & Reid, Seattle, and Amendola.
Staffing honesty still applies. Hour caps without hiring can break coverage. That does not move fatigue out of the staffing equation. It puts crash risk, liability, and decision quality into the same math as overtime dollars—where they belong.
A fit-for-duty frame
Supervisors need language that targets systems without turning fatigue reporting into punishment. Ground each item:
- Treat extreme fatigue like impairment for assignment decisions—same seriousness as other fitness-for-duty calls—without making honest reporting a career hit. (Practice framing aligned with NPI’s culture guidance; impairment translation from Dawson & Reid, 1997.)
- Cap consecutive hours and weekly totals; include secondary employment in the count. (NPI InFocus practice synthesis: ~12 h/day and ~60 h/week upper bounds commonly cited.)
- Protect minimum rest between shifts; prefer forward rotation where feasible. (NPI InFocus practice guidance.)
- Run fatigue risk-management training with behavior change over weeks—not a one-hour video. (Seattle RCT: 8 × ~15-min modules + at-home actions moved actigraphy sleep and drowsy-driving reports; James, James, & Atherley, 2024.)
- Prefer shift designs with evidence on sleep and OT—10s over default 8s where coverage allows; do not assume 12s are free days off. (Amendola: more sleep and far less OT on 10s vs 8s; higher sleepiness and lower alertness on 12s vs 8s.)
- Measure next quarter what the studies measured: OT hours, sleep indicators if available, drowsy-driving or near-miss reports—not poster campaigns. (Seattle outcomes; Amendola OT/sleep; NPI measurement framing.)
Closing
You would not shrug at 0.05 BAC. Stop shrugging at 17 hours awake—scoped correctly as psychomotor impairment magnitude, still operationally decisive.
Fatigue is readiness equipment, not a wellness elective. Schedules are tactics. Training that changes behavior can move sleep and safety reports. Neither lever replaces the other.
Readiness means the human system can still decide under load. Sleep is part of that system. Pick one lever this quarter—a roster rule or a fatigue-training pilot—and put a number on it.
References
Dawson, D., & Reid, K. (1997). Fatigue, alcohol and performance impairment. Nature, 388, 235. https://www.nature.com/articles/40775
James, L., James, S., & Atherley, L. (2024). Evaluating the effectiveness of a fatigue training intervention for the Seattle Police Department: Results from a randomized control trial. Journal of Experimental Criminology (online May 2024). NIJ library: https://nij.ojp.gov/library/publications/evaluating-effectiveness-fatigue-training-intervention-seattle-police ; technical report (OJP 309959): https://www.ojp.gov/pdffiles1/nij/grants/309959.pdf
Amendola, K. L., Weisburd, D., Hamilton, E. E., Jones, G., & Slipka, M. (2011/2012). The shift length experiment: What we know about 8-, 10-, and 12-hour shifts in policing. National Policing Institute / NIJ. https://www.policinginstitute.org/publication/shift-length-experiment/ ; executive summary: https://www.ojp.gov/pdffiles1/nij/grants/237331.pdf
National Policing Institute. (InFocus). Shift work, fatigue, and overtime in policing: Balancing officer wellness and public safety. https://www.policinginstitute.org/infocus/infocus-shift-work-fatigue-and-overtime-in-policing-balancing-officer-wellness-and-public-safety/