Posture can be thought of as the position of the limbs or the manner in which the body carries itself as a whole.  A postural analysis assessment gives an excellent indication of the presence of muscle imbalances in the body.  Muscle imbalances occur when a muscle on one side of a joint becomes tight and strong (called the agonist muscle) and its partner on the opposite side which also performs the opposite action (known as the antagonist muscle) become lengthened and weak.  Muscle imbalances may eventually lead to injury and pain by altering the biomechanics of the joint and can also cause movements to be uncoordinated and inefficient.  Therefore, the postural analysis gives an indication of what muscles might be tight and strong even before beginning a flexibility assessment.