I will try and get a better full body picture of her. She is 18 years old. When I bought her a year ago she had no muscle mass on her body and she had a huge muscle underneath her neck. With proper dressage training she has a great neck and her back has gone up a ton and she almost has no sway back. She went through a period where she was quite skinny and slowly she has gained back the weight. I assure you she has plenty of muscle on her back. i will try and take some pictures and make a video of her tomorrow