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Figure 2 Effect of lower body negative pressure (LBNP) on reactive hyperemic flow and heart rate. (A, left) Basal and maximal post-ischemic flow at baseline. (A, right) Basal flow and maximal post-ischemic flow during LBNP. The increase in blood flow during hyperemia was not significantly different between baseline and LBNP (p = 0.099 by two-way repeated measures analysis of variance). (B) Lower body negative pressure significantly increased the heart rate (*p = 0.0013 by the paired t test).