Teenagers should be useful, but I don't know in my twenties, but I should take it for a long time and straighten myself consciously. After all, it's just an aid, because I don't know what it's like to be straight after a long hunch. That's what I am. There are several ways to try:

1. Stand against the wall, with arms, thin head, shoulders and heels attached to the wall. Although effective, but the process is very painful ~ I tried:

2. Practice yoga and buy a book yourself. There is a method called camel style, which I think is very useful to me. There is another method, which has always been taught by Bel Canto. Put a long straight stick around your waist (if it hurts a little) and put the stick behind your back with both hands. You will feel your shoulders straight and stick to it for more than ten minutes every day, hoping to help you.