Physical training and baroreceptor control of sympathetic nerve activity in humans

Abstract

In nine sedentary subjects (16.5±0.4 years, mean±SEM) we measured blood pressure (Finapres device), heart rate (electrocardiogram), and postganglionic muscle sympathetic nerve activity (microneurography from the peroneal nerve) at rest and during intravenous infusion of phenylephrine and nitroprusside. These measurements were performed before and after 10 weeks of endurance training (2 h/d, 5 d/wk) that increased maximum oxygen consumption from 34.8±2.1 to 40.4±1.8 mL/kg per minute (P