Stand on a board that is narrower than your feet, with the board in the middle of your feet so that you are not touching the floor with any part of your foot. You should wear flat shoes for this exercise. The board should be on a non-skid surface.
Keep your feet parallel with the floor as you balance. You should adjust your trunk with the use of your hip muscles, keeping legs relaxed. Rotate your head from side to side within a comfortable range and speed.
You can perform this exercise with your eyes open or closed following your therapist's guidelines.