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Fatigue (Circadian cycle (Factors that impact circadian rhythm (Early…
Fatigue
Circadian cycle
Afternoon nap window
Wake maintenance zone
WOCL
Factors that impact circadian rhythm
Early stars
Night duty
24 hours flips
Scheduling practices
Avoid early starts/3 early start in a row (before 0900)
Avoid circadian flips
Avoid 3 nights duty periods in a row >2100
No more than 4 12/h duty periods in a row
Measurements
KSS; sleepiness
VAS (visual analogue scale): Fatigue
Samn-Perelli: Fatigue
Homeostatic level (sleep debt)
# of hours awake prior sleep/wake
Extended wakefulness: 1-19 hrs performance declines
Workload
Task time
Time on task
Individual variables
Sustaining
Choronotype
Age
Mood
Temporary
#calories consumed in the last hour
External variables
Noise
Light
Safety Risk
Performance impairment
Sleep loss