The long figure is generally caused by too thin body and too little adipose tissue, which is manifested in the flat-chested and wooden figure of girls. If you want to change this figure, you need to increase the body fat content, that is, gain weight. But you can't do what you want without a purpose. If you want to change your body lines while gaining weight, you need to gain muscle. This is a professional field. I suggest you find a personal trainer to take you to do it, so you won't take many detours. After practicing ass-butting, the curve of the body will change and the long figure will no longer exist.
People with shoulder width can't be changed only by exercise, which is determined by the skeletal structure of the body. Exercise can only change muscle lines, not bone length. Therefore, if we want to change the status quo of narrow shoulders, we need to make more efforts in the study of dressing style. People with narrow shoulders need to wear clothes that can stand up, such as suits with shoulder pads and shirts with obvious lines, which can cover up the shortcomings of narrow shoulders. Be careful not to try sweaters, which are loose and not easy to hold up.
Besides these, you can also choose some long-term exercises that can improve your posture, such as yoga and ballet. Ballet is difficult to learn, so yoga is recommended, and now it is gradually emerging. Yoga can not only improve bad posture, but also make its own lines more perfect for a long time, fundamentally changing the slender figure with narrow shoulders and flat chest.
The change of character lines is not overnight, and it needs long-term persistence.