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(A–C) Relationships between Total Sleep Durations and Nocturnal Physiology. The relationship between total sleep duration and nocturnal physiological parameters are demonstrated for both the night before and the night after a PBMT session, including (A) average HR, (B) average HRV, and (C) average RR. (HR, heart rate; hrs, hours; HRV, heart rate variability; ME, main effect; RR, respiration rate).
