Therapeutic devices (10) and methods suitable for stretching the Achilles tendon. Each device (10) includes a base portion (14) and at least one wedge portion (12). The wedge portion (12) has heel and toe ends (16,18), inside-foot and outside-foot edges (20,22), and an upper surface (24). The upper surface (24) has a nonuniform elevation relative to the base portion (14) as a result of the wedge portion (12) having a fore-aft taper in the fore-aft direction and a lateral taper in the lateral direction, wherein the inside-foot edge (20) has an increasing elevation toward the toe end (18). The wedge portion (12) further has a nonconstant lateral width as a result of the toe end (18) being wider than the heel end (16). The fore-aft and lateral tapers are sufficient so that placement of a users foot on the upper surface (24) causes supination and locking of the foot and enables stretching of the Achilles complex.