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. Author manuscript; available in PMC: 2019 Mar 13.
Published in final edited form as: J Adolesc Health. 2017 Dec 2;62(2):184–190. doi: 10.1016/j.jadohealth.2017.09.010

Figure 2.

Figure 2.

Heart rate (HR) and heart rate variability narrow absolute high frequency power (HFna) in arousal-free rapid-eye-movement (REM) and non-REM (NREM) sleep in 82 male and 67 female adolescents. NREM-REM differences for HR are significantly greater in females (~3.9 bpm) compared to males (~2.4 bpm). Vertical bars represent standard errors.