Hi! Based on the pictures, you appear to be in great shape and I'm not sure what you are looking for with regards to your back. There are techniques that are offered known as hi def lipo or hi def body contouring that uses liposuction to create muscular definition. As was mentioned in another answer, your body type may not be one in which your waist line is defined. Surgically, the waist can be defined or accentuated with liposuction to the waist with or without fat transfer to the lateral hips to give that more hourglass appearance. The ability to do this all depends on the the amount of fat that you have that is able to be removed from the waistline and/or potentially harvested from other areas and transferred. Bodytite is a skin tightening modality that is typically reserved for patients that have poor skin quality or are older where the skin is less likely to shrink following liposuction. So whether or not you are a good candidate depends on your skin quality. Ultimately, you would need to be examined in person to be able to provide you with a more definitive recommendation. Hope this helps! -drdanielkirk