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Effects of ESD on subjective feelings of sleepiness, fatigue, and stress. Data present estimated marginal means ± SEM based on GLMMs for subjective feelings of (A) sleepiness, (B) fatigue, and (C) stress for the ESD condition (red lines) and the control condition (blue lines). The gray shaded area indicates recovery periods with an 8-hour sleep opportunity per night. **P < 0.01, *P < 0.05. n = 22–24.
