She received a Bachelor of Arts in English from the University of Maryland, and she is a certified personal trainer, fitness nutrition specialist, and yoga teacher. She has written for various online and print publications, including Livestrong. Visit the writer at www. It can't make you 5 inches taller, or change the width of your hip bones. But it can help you lose weight and build muscle. Although your leg and butt size is largely determined by genetics, losing total body fat can help your legs slim down, and doing muscle-building butt exercises can help you augment the size of your cheeks.