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a) Subjective sleepiness from the SSS and b) physical fatigue ratings completed 0.5 h after waking, 5.5 h after waking (Morning/Afternoon), 6 h before bed (Afternoon/Evening), and 1 h before bed. The sleepiness scale maximum is 7. The physical fatigue scale maximum is 10. Scores were averaged for baseline days 2–6 and the 3 treatment days.
