L-arginine Supplementation and Resistance Exercise

The purpose of this study was to examine the acute endothelial, cardiovascular, and performance responses to L-arginine by assessing flow-mediated dilation (FMD) and heart rate variability (HRV) both before and after resistance exercise to fatigue. Thirty (15 male, 15 female) physically active participants volunteered for a randomized, cross-over, double-blind, placebo- controlled clinical trial. Participants completed five sets of elbow extension-flexion exercise after consumption of either 3 g of placebo or 3 g L-arginine.