A device and method for preventing the damage underlying lateral epicondylitis (tennis elbow) or medial epicondylitis (golfer's elbow), or both lateral epicondylitis (tennis elbow) and medial epicondylitis (golfer's elbow), or for treating the damage underlying lateral epicondylitis (tennis elbow) or medial epicondylitis (golfer's elbow), or both lateral epicondylitis (tennis elbow) and medial epicondylitis (golfer's elbow). The device comprises a central support (12), and one or more than one extension-adduction apparatus (32) or one or more than one flexion-abduction apparatus (50), or both one or more than one extension-adduction apparatus (32) and one or more than one flexion-abduction apparatus (50).