I am 28 years old and use to be very active growing up. Over the past few years I have slowed down my activities and therefore have begun to have a sagging butt. For the past 3 years I have a second line about 1" under my butt crease. I have little to none visible cellulite, but I hate looking at the double line and it seems as though no matter how much weight training I do, I can't seem to get rid of it. What would be my best course of action?