What happens to the muscles that cross the hip when the pelvis is posteriorly or anteriorly tilted?
Wayne, those muscles that cross the hip in a situation like that are either stretched out or placed in a shortened position. In either case they are not effective in what they should be doing. They are both weakened and will allow further changes in pelvic position. This in turn will cause problems for the lower back as it is no longer on a stable platform. Since the hip is not moving normally it will cause the other muscles to have to work harder to make up the stabilization of the pelvis and lower back along with having to work harder to perform their normal tasks. This will often result in very irritated muscles or muscles that will go into spasm.
