Abstract: In accordance with the present invention, there is provided a therapeutic exercise device having a polyhedral foam body. The body may comprise a bottom side, a front side, a rear side, a left side, and a right side for supporting a top side. The top side may include a sloping surface and a plurality of arcuate surfaces cooperating to properly support and position an exerciser's legs, pelvic region and spinal vertebrae system to develop and maintain the musculoskeletal system.