The lower back is a common area of weakness—our patients typically describe achy, tight or stiff lower backs. Some develop referred pain from nerve conditions that may travel down a leg, for example Sciatica or Piriformus Syndrome.
When feet and legs are not working the way they were intended, repetitive abnormal stress can be localized within the lower back. The sacroiliac joint is the area connecting the torso with the pelvis. As the legs internally rotate, the pelvis must anteriorly tilt, compensating for this motion. This in turn leads to sacroiliac joint instability requiring muscular compensation. This muscular compensation will lead to postural and biomechanical changes, potentially resulting in pain in other areas.
Pelvic instability will also arise in the case of a structural or functional leg length difference and create a scoliosis. A structural leg length difference occurs when a true difference between the lengths of the right and left legs exists. In this case, balancing the leg length is often a means of stabilising the leg length difference. If a muscular asymmetry exists within the torso or has been caused by a previous injury, then muscular and postural rehabilitation may be necessary to reduce the functional leg length difference.