"Stand Up Straight," Defined
In order to correct your posture, however, you have to know what good posture looks like. It is not shoulders and head flung back. You should have three main curves: The cervical/neck, thoracic/ribs, and lumbar/low back/sacrum into the coccyx. You want to be balanced front to back and side to side. “If you look from the side, if your ear, shoulder, hip, knee and ankle are in a pretty straight line, give or take, then your curves are most likely in the right positions,” says Dr. Wilmarth, who is also Chief of Physical Therapy, Harvard University Health Services.