Abstract: A pair of plates are interconnected by an adjustable post assembly such that the plates are in substantially parallel opposing relationship. The post assembly is constructed so that the two plates can be adjusted both pivotally and vertically relative to each other and then fixed in a desired position. The device is utilized by a person wishing stretching and/or adjustment of the lumbar and thoracic spines. Such person lies on his or her side with the uppermost knee wrapped around the post assembly and the thighs between the two plates. The upper plate is then rotated until it is directly above the upper thigh and then lowered until it presses against such thigh, using the lowermost hand, i.e. the hand closest to the table or floor on which the person is lying. With the thighs and legs fixed relative to each other, the upper torso is twisted towards the floor or table, thereby stretching and/or adjusting the lumbar and thoracic spines.