Single Leg Exercise:
Single leg exercises do one thing especially well and that is hit the quatratus lumborum. One of the QL’s main functions is to laterally stabilize the pelvis in a single leg stance. One place this is important in everyday life is just simply walking. Each step requires the QL to hold the pelvis up so to speak. If the QL doesn’t do its job the pelvis will drop. When this begins to happen, low back problems aren’t far away.