Abstract: In one preferred embodiment, a device for strengthening the lower back of a user which includes a frame having a horizontal member for support of the hips of the user and having, spaced apart from the hip support, a horizontal platform for support of the head, shoulders, and upper chest of the user. The user places himself upon the frame so that his hips, head, shoulders, and upper chest are supported, with his legs hanging vertically from the hip support. The chest of the user is largely unsupported to permit comfortable and easy breathing. The strengthening motion comprises raising the legs from the vertical position to the horizontal position and again to the vertical position. There is little or no risk of injury to the vertebral column, due to the fact that the vertebral column is stationary when the exercise is executed. In another preferred embodiment, a hydraulically operated hinged member effects the above leg movement to provide therapy for disabled users.