20/06/2018
Tennis elbow is thought of as being caused by a backhand in tennis because of the extension of the hand at the wrist joint, which stresses the muscles of the common extensor belly/tendon (extensor carpi radialis brevis, extensor digitorum, extensor digiti minimi, extensor carpi ulnaris) that attach to the lateral epicondyle of the humerus.
In Leon Chaitow’s terms: use, overuse, misuse, abuse.
BTW, for this reason, tennis elbow is also known as lateral epicondylitis (if inflamed) or lateral epicondylosis (if not inflamed). Or better yet, lateral elbow tendinopathy.
But besides the fact that any activity that requires extension of the hand or fingers can cause tennis elbow, it is also caused by flexing the fingers to grip an object, such as a tennis racket, or anything else, like a steering wheel, quart of milk, or a pen. 😕
This is because flexing the fingers by the flexors digitorum superficialis and profundus muscles would also flex the wrist joint, if it were not for contraction of wrist extensor musculature (usually extensor carpi radialis brevis) to stabilize the hand at the wrist joint.
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