Mar 28, 2015 04:05 PM EDT By Staff Reporter, UniversityHerald Reporter

A youth player's history of shoulder and elbow injuries may correlate with their pitching speed, height and the number of teams they played for, according to a recent study.

Researchers at Rush University found that a 10-inch increase in height is associated with a 20 percent increase in likelihood of a history of injury, 10 mile per hour increase in velocity is associated with a 12 percent increase likelihood of a history of injury, and playing for more than one team is associated with a 22 percent increase in the likelihood of a history of injury.

"Using these three factors alone allowed accurate prediction of 77 percent of injury histories," said Peter N. Chalmers, lead author of the study.

For the study, researchers evaluated 420 youth and adolescent pitchers in pre-season training using two-camera, high-definition, high-speed video analysis. The players' pitching and injury history were also collected. Thirty-one percent had a history of a previous injury and 30 percent had current pitching-related pain. Shoulder and elbow pain and injury are common in youth baseball players and significant research has been done to evaluate causes.

This study is one of the few to evaluate breaking pitches as a risk factor for injury, although breaking pitchers did not correlate with injury history once the authors had accounted for pitch velocity.

"Pitch velocity was the single strongest correlate with a history of shoulder and elbow injury," said Chalmers. "The current USA Baseball, Little League America, and Major League Baseball recommendations lead to youth and adolescent pitchers throwing a lower number of pitches at a high velocity, but this strategy may not decrease the 'peak' stresses experienced by the elbow and thus may not decrease the risk of injury. Further study is needed."

The findings were released at the American Orthopaedic Society for Sports Medicine's (AOSSM) Specialty Day.

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