Root or Stability
To develop root or stability in your posture:
1) Lift your head upwards, as if suspended by a string. Feel the point on the top of your head, in line with the spine, is being pulled upward so that your chin is tucked inward, yet remains level. Keep your spine straight and your torso erect.
2) At the same time, relax and let your body sink, by releasing tension in your body, particularly in your hip joints. Feel as if you are sitting, and feel your tailbone sinking down to a point between your heels.
3) Your weight is equally distributed around the soles of your feet. Your toes are lightly gripping the ground so that the centers of your feet are slightly arched or hollow.