To begin, stand and simply feel your feet on the ground. Notice the springiness and stiffness in your legs. Feel the way your feet contact the ground, almost like suction cups. With your feet firmly planted, sway slowly from the ankles, first from side to side, and then forward and backward. This will help you locate your center of gravity, in the upper pelvic area. Place your hands on your lower belly and sense your center of gravity. It may be helpful to continue swaying gently while doing this.

Peter A. Levine in Healing Trauma