Click on image to view larger version.

Figure 1 (A) Endothelium-dependent, flow-mediated dilation (FMD) and (B) endothelium-independent glyceryl trinitrate (GTN; nitroglycerin)-mediated dilation of the brachial artery (n = 15). Data from individual subjects and mean values (±SE) are plotted for results following eight weeks of inactivity (open circle) and eight weeks of exercise training (closed circle). Endothelium-dependent FMD response was significantly greater following training (p < 0.001, paired t test).