Quadricep Muscle
As the name implies, the quads are a muscle group comprising four individual muscles. The Rectus Femoris (Upper Quad) has the function of bending the hip and straightening the knee. The Vastus Lateralis (Outer Quad) assists in the straightening of the knee, as do the Vastus Intermedialis (which sits behind the Upper Quad) and the Vastus Medialis (Inner Quad). The squat mimics the function of each of these muscles allowing you the potential of fully developing them. All you’ve got to do is take a look at a guy who’s done just that to realize that it’s gonna be worth it – for the quads, when fully developed and striated, are a thing of absolute beauty.