B&G will definitely help shape your butt. I love this one although I get really sore afterwards! I also agree about the leg presses... After losing 125 pounds, my butt ( among other body parts) was completely deflated. I have been diligent about leg presses being part of my lower body workouts, and I have to say I am very proud of my booty now!! At 40 I actually have a nice, muscular, lifted bottom... the difference from right after my weight loss and now is amazing! If I can do it, you can! Good luck!