posture [pos´chur]
an attitude of the body. Good posture cannot be defined by a rigid formula; it is usually considered to be the natural and comfortable bearing of the body in normal, healthy persons. This means that in a standing position the body is naturally, but not rigidly, straight, and that in a sitting position the back is comfortably straight. Good standing and sitting posture helps promote normal functioning of the body's organs and increases the efficiency of the muscles, thereby minimizing fatigue.