answer:Good posture gives you height, gives the appearance of confidence, and I am thinking is better overall for back health. I have been losing my good posture from sitting and laying around too much. I think good posture comes from strengthening the muscles of the back. The straighter you are, the more you correct your posture, the more the muscles will strengthen and good posture will become “normal” for you. When I was young I took ballet, and my PE teacher in school would make us sit up straight, and my grandmother used to do the same. I was constantly being corrected and it worked, I had fantastic posture back then, I would get complements on it, and also told I had a long neck, was graceful. In ballet a straight back is emphasized, while in other disciplines like gymnastics and cheerleading an arch in the back is observed. Today in America an arched back, what I think of as sway back seems to be desireable (I don’t mean that gymnasts are sway back) and I find it odd. Ballet, yoga, and pilates should help with posture, most dance for that matter, along with demanding it of yourself in general.