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Steady-state normoxia before and after acute intermittent hypoxia. Representative data from male participant (35 yr, 25.5 kg/m2; muscle sympathetic nerve activity (MSNA) signal-to-noise ratio pre = 5.6, post = 6.0). BP, blood pressure; HR, heart rate; MSNAint, integrated MSNA signal; Vt, tidal volume.
