Arm wrestling and fractures

Clinical Cases points out a video where arm wrestling leads to an arm fracture:

The BMJ with the medicine behind the break:

This type of arm wrestling injury tends to occur when one arm wrestler tries to force the match in an effort to win or to change the tide of the contest. As the offensive wrestler continues with the attack, the defender’s internalrotator shoulder muscles suddenly and passively stretch and change from their maximally concentric contraction to an eccentric compensatory contraction, resulting in an intense rotational force with subsequent humeral fracture.

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