Effects of acute aerobic and concurrent exercise on skeletal muscle metabolic enzymes in untrained men

Background Acute exercise can increase skeletal muscle citrate synthase (CS) enzyme activity and resting skeletal muscle mitochondrial enzyme activity has been linked to maximal oxygen consumption (\(\dot {V}{{\text{O}}_{2\hbox{max} }}\)). We investigated: (1) if acute aerobic exercise (AEx) increases muscle metabolic enzyme activities other than CS; (2) if the addition of acute resistance exercise (REx) enhances the response to AEx (A + REx); and (3) if post-exercise muscle metabolic enzyme activity was related to \(\dot {V}{{\text{O}}_{2\hbox{max} }}\).