Exercise 4: Squats; dome & flat surfaceStand on the BOSU ball (flat side down) with the feet facing forward -approximately hip-width apart. Avoid an excessively wide stance. Keep the arms either by the sides or extended in front of the chest. Inhale & flex the hips and squat to a parallel or just above parallel position. Exhale and simultaneously return to a standing position. Contact the core to stabilize during the up and down movement. Turn the ball over and repeat on the flat surface.