An articulating joint exercise apparatus is provided having a portable structural frame, a slide, a body-engaging mounting fixture, and a brake. The slide has a friction-reducing bearing surface configured for movement along the rail extending between a range corresponding with extension and retraction of a user limb and associated user joint that exceeds an end range for a user under rehabilitation corresponding with hyperextension and hyperflexion. The body-engaging mounting fixture is affixed for articulation to the slide and is configured to attach to a user limb of a user joint. The brake is carried by the slide and is configured to be actuated by a user to affix the slide and body-engaging mounting fixture at one of an anatomically limited terminal range with a static stretch of a user joint when a limb of a user joint is affixed to the mounting fixture. A method is also provided.