Sports Injuries: Kin 3K03
Lateral epicondyle attachment site for wrist flexors
-carpi radialis muscles
-supinator muscle (doesn’t attach directly to epicondyle but still functions with flexors)
• Epicondylitis or Tendinopathy?
• We’re dealing with a tendinopathy, chronic failure of the tendons attaching to lateral epicondyle
o Extensor Carpi Radialis Brevis (ECRB)
o Extensor Digitorum Communis (EDC)
o Radial head closest structural relationship to ECRB & EDC. Prominent, tendons stretch
around it and are subject to compression within their joints. (most subject to tendinopathy)
o Acute to chronic progression. Chronic degenerative process.
o Elite tennis players are more likely to have shoulder problems than elbow.
• Well-localized pain
o Insertional or mid-substance?
o Very specific pain location, directed towards epicondyle and radial head (right at the insertion of
lateral epicondyle or 1 or 2 cm distal to that point, where the friction happens)
• Exacerbated by?
o Wrist; active/resisted extension from neutral position
Resisted wrist extension while in neutral wrist position (lengthened muscle) and radial
deviation is the MOST aggravating.
o Finger; resisted extension of the middle finger
o Forearm; pronated forearm position while hand is gripping something (picking up kettle from
o During tennis backhand, wrist extensors need to contract at the time of contact with the ball in