Furthermore , the HT regimen ( i ) enhanced cardiac output ( Q ( H ) ) and perfusion ( Q ( M ) ) / oxygenation of vastus lateralis during exercise ; ( ii ) increased levels of CD@ ( + ) / KDR ( + ) / CD@ ( + ) , CD@ ( + ) / KDR ( + ) / CD@ ( + ) , and CD@ ( + ) / KDR ( + ) / CD@ ( + ) cells in blood ; ( iii ) promoted the proliferative capacity of these CPC subsets , and ( iv ) elevated plasma nitrite/nitrate , stromal cell-derived factor-@ ( SDF-@ ) , matrix metalloproteinase-@ ( MMP-@ ) , and vascular endothelial growth factor-A ( VEGF-A ) concentrations .