We know that the gastroc is on the back of the lower leg, superficially. That means it’s close to the surface. And, really it’s the closest calf muscle to the surface.

The name of the muscle is from Latin and Greek and translates to stomach of the leg -- that’s referring to the bulging shape of the calf.

Gastroc goes from two bellies at it’s attachment site above the back of the knee crease and forms into one attachment below the joints of the ankle.