Epinephrine Infusion Does Not Enhance Net Muscle Glycogenolysis During Prolonged Aerobic Exercise

The role of physiological elevations of plasma epinephrine concentration on muscle glycogenolysis during prolonged exercise was investigated. Eight healthy volunteers cycled for 90 min at 65%. VO2max on two occasions; one with an infusion of epinephrine (EPI) and once without (control). Biopsy samples were taken from the vastus lateralis muscle both prior to and following exercise for the analysis of muscle glycogen. EPI infusion significantly …