Abstract: A therapeutic treatment machine alternatingly applies compression and traction to a patient. A frame includes: a platform having an upper body support pad with controllable resistance to forward and backward displacement; rollers supporting the lower back, buttocks and thighs; and a motor-driven foot support displaceable forward and backward predetermined distances and speeds. Tubular frame members fit over and adhesively engage arms projecting orthogonally from a corner section. Legs telescopically receive leg support members extending orthogonally from the arms. Compression and traction are each forcefully effected by motor rotation converted to longitudinal reciprocation of a linkage that drives the foot support. The patient's feet are held in place against footplates by clamps supported on a T-bar cross member having a stem extending forwardly through a longitudinal slot in the footplates.