Fig. 1.
(Top) Original recordings of muscle sympathetic nerve activity (MSNA), mean arterial pressure (MAP), and heart rate (HR) at baseline and at 60 (HG60) and 120 seconds (HG120) of 30% and 40% of maximal voluntary contraction (MVC) isometric handgrip exercise (HG). (Bottom) Autonomic and cardiovascular responses at baseline and during HG exercise, expressed as 1-minute averages.