November 13, 1987

Leapfrog Leg

Author Affiliations

University of Michigan Medical School Ann Arbor

University of Michigan Medical School Ann Arbor

JAMA. 1987;258(18):2530. doi:10.1001/jama.1987.03400180064026

To the Editor.—  The aphorism "Don't change the rules late in the game" seems particularly apropos for leapfrogging. We report, apparently for the first time in the world's medical literature, serious injuries resulting from a recent modification of this medieval game.Each spring at the University of Michigan, the association of fraternities and sororities engage in a so-called Greek Olympics. One event is leapfrogging. This year, 19 coed teams entered the 40-yd competition. The rules were altered slightly. Specifically, the player in the stationary position (also known as the leapee) was required to keep her/his knees locked in extension.The results were disastrous: three major knee injuries occurred, all to women leaping over men. All injuries were sustained when the leaper landed in a maximally abducted position. The list of damages included one first-degree medial collateral ligament sprain, one grade III anterior cruciate ligament tear, and one complete anterior cruciate