Lateral trunk lean in pitchers affects both ball velocity and upper extremity joint moments

The American Journal of Sports Medicine
Matthew SolomitoCarl W Nissen

Abstract

The incidence of upper extremity injuries in baseball pitchers is increasing. Over the past decade there has been a great deal of research attempting to elucidate the cause of these injuries, focusing mainly on the mechanics of the pitching arm with no examination of other key segments, such as the trunk. This is surprising, as coaches will often comment on trunk position in an effort to improve pitching outcomes. To determine the association between contralateral trunk lean and ball velocity and the moments about the elbow and glenohumeral joint. Descriptive laboratory study. A total of 99 pitchers were recruited for this study and underwent a pitching analysis using 3-dimensional motion analysis techniques. A random intercept mixed-effects regression model was used to determine if statistically significant associations existed between contralateral trunk lean (away from the pitching arm side) and ball velocity, as well as the elbow varus moment and glenohumeral internal rotation moment. The results demonstrated that the greatest contralateral trunk lean occurs around the time of the peak elbow varus moment. Statistically significant associations were found between contralateral trunk lean and increased ball velocity (P=.003) ...Continue Reading

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Citations

Sep 13, 2016·Current Sports Medicine Reports·Steven F DeFrodaPeter K Kriz
Jan 28, 2017·Research in Sports Medicine·Joseph G WasserHeather K Vincent
May 12, 2016·Orthopaedic Journal of Sports Medicine·Robert F LaPradeMatthew T Provencher
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Aug 3, 2017·Sports Biomechanics·Katsue KawamuraKimitaka Nakazawa
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May 29, 2018·Journal of Applied Biomechanics·Hardeep SinghCarl Nissen
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Apr 14, 2018·Journal of Applied Biomechanics·Rafael F EscamillaGlenn S Fleisig
Aug 20, 2019·The American Journal of Sports Medicine·Andrew D CohenMatthew J Solomito
Nov 13, 2019·Sports Biomechanics·Jacob R GdovinJohn C Garner
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May 21, 2020·Sports Biomechanics·Matthew J SolomitoCarl W Nissen
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Jun 25, 2021·Journal of Sport Rehabilitation·Sierra HakansonCathleen N Brown
Sep 4, 2021·Journal of Orthopaedics·Joseph E ManziJoshua S Dines

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