Occupational Fatigue Exhaustion Recovery Scale

Adequate recovery means you feel reasonably restored before the next work shift—not necessarily 100% refreshed, but capable of safe, effective work. The scale measures subjective recovery; objective indicators include sleep duration (typically 7–8 hours) and quality. A score of 25+ on the inter-shift recovery subscale (out of 35) suggests adequate recovery. Scores 16–24 indicate marginal recovery (may accumulate to chronic fatigue), and <16 indicate severe recovery deficit (likely causing safety risk). If inter-shift recovery is low despite reasonable sleep opportunity, consider sleep disorders (apnea, insomnia), circadian misalignment (difficult night shifts), or off-work demands (childcare, commute, second job).

High chronic fatigue is a strong risk factor for burnout, but not deterministic. It means your work demands are consistently exceeding your recovery capacity. To prevent burnout, interventions are needed: (1) if your schedule is the issue, request shift change or staffing adjustment; (2) if off-work demands are compounding it, consider whether secondary employment or commute can be adjusted; (3) discuss with your occupational health provider to rule out sleep disorders or medical conditions; (4) implement fatigue management (sleep hygiene, exercise, stress reduction). Monitoring your OFER score over months will show whether the situation is improving or worsening.

Yes. Acute fatigue—feeling tired at the end of a work shift—is expected and normal, especially in physically or mentally demanding roles. If you feel tired after work but recover well (feel refreshed after a good night or day off), your fatigue is acute and manageable. This is not a health concern unless the acute fatigue prevents you from safe performance or from meeting off-work responsibilities. The concern arises when acute fatigue is not fully reversed by a shift break or rest day, leading to chronic fatigue accumulation.

Yes. Night shift workers typically score higher on acute and chronic fatigue and lower on inter-shift recovery due to circadian desynchrony and inadequate daytime sleep opportunity. Do not compare night shift OFER scores directly to day shift scores; instead, trend night shift scores over time to detect worsening, or compare to normative data for night shift populations if available. If your night shift workers have chronically high fatigue, examine shift schedule design (length of shift, number of consecutive nights, turnaround time between shifts) and consider phase-out of vulnerable workers or schedule rotation to lower-fatigue patterns.