The Psoas Awakening Series synergistically combines the standing poses to awaken the psoas muscle. We accomplish this by first contracting the psoas in poses that face forward, then in poses that face the side. We complete the series with twisting postures.
Remembering that this muscle is usually “hidden” in the unconscious part of the brain, we must first isolate the psoas in each pose, bringing it back to consciousness.
I use the technique of isometric contraction to isolate and awaken a dormant muscle. This technique requires an understanding of the action of the various muscles. For example, the psoas acts to flex the hip, i.e., contracting the psoas either bends the trunk forward or draws the knee up. If you are contracting your psoas on one side, it laterally flexes your trunk. It is also synergizes external rotation of the hip. http://www.bandhayoga.com/keys_psoas.html