17-year-old ballet figure can correct chest shape and hunchback? How long will it take to practice?

There will definitely be a great improvement!

Ballet requires very strict movements, and under the guidance of professional teachers, it will significantly improve people's bad habits in standing. For example, in a normal standing posture, you need to step on the ground with your feet, put your legs together, tighten your ass, tuck in your abdomen, straighten your back, open your shoulders and press down, keep your chin level, and look ahead. After a long period of training, your posture and temperament will be obviously improved.

How long will it take to practice? I don't know how to answer more accurately. Because it takes about 3 months to see the initial effect, the longer the practice time, the better the effect. /kloc-it's not too late to study at the age of 0/7, because many aunts in their fifties and sixties are studying and making great progress.