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Forearm blood flow (FBF) responses (A and C) and total FBF (B and D) to acetylcholine in the absence and presence of selective ETA receptor blockade (BQ-123) before and after 3 mo of aerobic exercise training in postmenopausal women. Values are represented as means ± SD. *P < 0.05 vs. saline. Differences in FBF responses and area under the curve were determined by repeated-measures analysis of variance.
