Round shoulders and hunchback can certainly be corrected. The fundamental reason for round shoulders and hunchback is improper posture, which is caused by the muscle strength in the front than the muscle strength in the back. Due to the muscle pull of the pectoralis major, it will cause the shoulders to buckle and hunch forward, if you strengthen the back muscle exercise can completely correct the round shoulders and hunchback. If you strengthen the back muscles, the back muscles are mainly the trapezius, latissimus dorsi, large and small round muscles, and also the posterior bundle of deltoid muscles. The increased strength of the posterior muscle groups will pull the bones of the chest and back, making them straight and backward, which can naturally correct round shoulders and humped backs.