Hi folks any advice to curb this bad habit my 12yr old dd has picked up a really bad slouch walks head down staring at her feet ..Keep telling her to stand up straight but she says her shoulders and back hurt when she does ... She's the tallest in the class a good head and shoulders above everyone else I don't know if its because of that ... Also checked her backpack made sure its not too heavy don't know what else too do ...not sure if she really is in pain or that's just an excuse ...any advice greatly welcomed ..