The fastest motion of any joint in any athlete is the shoulder rotation in baseball pitching.
Chapman’s pitch was one of the fastest ever recorded; one that pushed his body to the limit of human ability. And while athletes in other sports, like Usain Bolt in the 100-meter sprint, continue to rewrite the record books, don’t expect pitchers to throw any faster than Chapman. In a laboratory at the American Sports Medicine Institute in Birmingham, Ala., Dr. Glenn Fleisig studies the biomechanics of pitching, inviting pitchers ranging from middle schoolers to major leaguers to throw on the mound he has set up. When asked about Chapman’s pitch he says, “I’ve never seen anything like it.”
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