Some girls habitually have the action of containing the chest, this time there will be narrow shoulders, in this case you can work out the chest expansion exercise, correct the posture of the shoulders to achieve the purpose of making the shoulders visually wider. It is also possible to achieve an increase in the thickness of the deltoid muscle by performing shoulder abduction training in the gym, thus making the shoulders look wider. Shoulders include bony structures such as the scapula and clavicle, as well as soft tissue components such as ligaments, rotator cuffs, and deltoid muscles, and there is no way to achieve the purpose of widening the bony structures of adults through exercise, but through exercise, increase the thickness of the deltoid muscles, and then improve the distribution of muscles throughout the body, thus visually achieving the purpose of making the shoulders of girls look wider.