I love circuits because they offer not only a great muscle building results, but also burn off calories, and works as a cardio workout all at the same time. (liftingrevolution.com)
Training and eating properly are not enough to ensure the fastest muscle building results. (hardgainermusclebuilding.com)
It's also been touted for it's lean muscle building results and increased consumption of iron, which is so important for women to avoid anemia. (theeverygirl.com)