Once proper elbow position is cultivated the concept of the immovable elbow is used to cause all action to rotate around this point. This allows the elbows to protect the dynamic centerline as it rotates around the practitioner. Here the energetic nature of Cho Keu (elbow too close) and Fay Jeong (elbow too far away) invites violation energies which destroy the other elements of good form. To avoid these deficiencies one should be continuously mindful of the elbow position.