Apparatuses and methods are provided for the treatment of lateral epicondylitis (tennis elbow) via the stretching of an affected user's restricted muscle(s), be it the extensor digitorum communis (EDC), extensor carpi radialis brevis (ECRB), supinator muscle, or any combination thereof. The apparatus can comprise various adjustable straps and rigid members configured to secure the apparatus to the user's arm and hold the user's interphalangeal joints, metacarpal phalangeal joints, and wrist in flexion, the user's forearm in pronation, and the user's elbow in extension. This combination of joint positions can constitute a desired position which, when held for prolonged periods, can cause the elongation of the restricted muscle tissue. This in turn can cause relief of the user's symptoms of lateral epicondylitis.
