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Hindlimb resistance responses during free-flow exercise, metaboreflex threshold, and maximal metaboreflex activation (n = 6) for control (○) versus α1-blockade (▲; left), control versus β-blockade (■; middle), and control versus α1 + β-blockade (⧫; right). *P < 0.05 vs. the previous setting in the same experiment; †P < 0.05 vs. the control setting.
