Of or pertaining to posture.

Pertaining to the posture or position of the body, the attitude or carriage of the body as a whole, or the position of the limbs (the arms and legs). Postural hypotension is a drop in blood pressure ( hypotension ) due to a change in body position (a change in posture). It occurs when a person, often an older person, moves to a more vertical position: from sitting to standing or from lying down to sitting or standing. The change in posture causes a temporary reduction in blood flow and therefore a shortage of oxygen to the brain, which leads to lightheadedness and, sometimes, a "black out" episode, a loss of consciousness. See the entire definition of Postural

Postural means relating to or effected by posture. Posture is defined as the position of the limbs or the carriage of the body as a whole.

of or relating to or involving posture; "postural exercises"