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Improper trunk rotation sequence may influence injury risk in baseball players

October 10, 2014

Young baseball pitchers who do not have proper trunk rotation sequence while pitching may have an elevated risk of shoulder injury due to greater forces and angles placed on the joint, according to study findings.

Researchers used 3-D pitching kinematics data from 72 high school baseball pitchers to determine whether or not the athlete had proper trunk rotation sequence, which was defined as reaching peak pelvic rotation velocity before or after peak upper torso rotation velocity beyond the margin of error. T-tests were utilized to compare maximal shoulder external rotation angle, elbow extension angle at ball release, peak shoulder proximal force, shoulder internal rotation moment and elbow varus moment among pitchers in the proper and improper trunk rotation sequence cohorts.

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