Fig. 2

Blood pressures increase immediately after salt ingestion. Dots and vertical bars represent the median and interquartile range values for blood pressures measured every 10 minutes. The white dot, at time zero, represents the baseline blood pressure after a 40-minute period of resting. A After participants received 2 g of salt at time 0, mean arterial pressure (MAP) increased significantly at 10 minutes. Later, the course of MAP showed an apparent bimodal shape, as suggested by early and late significant increases over baseline (asterisks), with a mid-period (60 to 80 minutes) during which MAP almost returned to baseline. B Analogous patterns were observed for systolic blood pressure (SBP). The asterisks (Dunn’s multiple comparisons after a Freidman test) represent the following: *P < 0.05, **P < 0.01, ***P < 0.001, and ****P < 0.0001