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. 2020 Jan 31;10:1600. doi: 10.3389/fphys.2019.01600

FIGURE 1.

FIGURE 1

Eight HRV measures: three time-domain measures [(A) Mean heart rate (HRmean), (B) Standard deviation of NN intervals (SDNN), and (C) Root mean square of successive RR interval differences (RMSSD)], and five frequency-domain measures [(D) Absolute power of the very low frequency band (VLF power), (E) Absolute power of the low frequency band (LF), (F) Absolute power of the high frequency band (HF), (G) Absolute total power (TP), and (H) Ratio of LF to HF power (LF/HF)]. Measures are presented at rest (n = 22), 0–5 min (n = 11), 5–10 min (n = 11), 15–20 min (n = 7), 25–30 min (n = 7), 35–40 min (n = 7), 45–50 min (n = 7), 55–60 min (n = 7), 65–70 min (n = 7), and 75–80 min (n = 7). Means and standard errors shown.