Fig. 5From: The type of the functional cardiovascular response to upright posture is associated with arterial stiffness: a cross-sectional study in 470 volunteersHeart rate variability in the 3 phenotypes. Boxplots depicting low frequency (LF) power (a), high frequency (HF) power (b), and LF/HF ratio (c) of heart rate variability in supine and upright positions. Median (line inside box), 25th to 75th percentile (box), and range (whiskers); *p < 0.05, **p < 0.01, ***p < 0.001Back to article page