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PLM-induced vasodilatory response in young and old with and without intra-arterial l-NMMA infusion. A: leg vascular conductance (LVC) AUC calculated as the summed second-by-second response during the first 60 s of movement. B: l-NMMA-induced reduction in LVC AUC. Values are means ± SE. *P < 0.05, significant difference between control and l-NMMA. †P < 0.05, significant difference between young and old. #P < 0.05, significant reduction due to l-NMMA.
