One of the toughest muscles to activate when working the butt for a bigger and rounder butt is the hip muscles called gluteus medius. It is hard to activate because it is a tinny muscle. Most ladies give up along the line trying to activate the muscle in order to make the hips fuller and bigger. At some point, though, I was also frustrated. But somehow I figured it out and was able to make my hips look much better as you will see in the Wider Hips Workout video much later.