Paper 17: Decreased Glenohumeral External Rotation is associated with Elbow Injury in Adolescent Baseball Pitchers

Objectives: To compare bilateral standard glenohumeral range of motion, humeral torsion & torsion-corrected motion within and between healthy adolescent baseball pitchers who have an injury to the throwing elbow. Secondarily, analyze relationship angle rotational in pitchers. Methods: Baseball aged 13-17 were prospectively enrolled into either a group, if currently pitching community without complaint or injured they presented clinic for elbow related pitching. Bilateral internal external rotation was measured degrees using bubble goniometer with scapulothoracic joint manually stabilized. angles Ultrasound used calculate motion. Parametric tests values groups both dominant non-dominant extremities significance defined as p<0.05. Pearson’s correlation evaluate each group. Results: Twenty-nine twenty-five no difference age hand dominance groups. The shoulder (Table 2) 3) demonstrated significant increase retrotorsion increased GIRD. However, present Injured displayed less well compared 4). No measurements found A moderate ipsilateral (r=0.49) (r=-0.58) (Figure 1) but (r< 0.3) these measures Conclusions: Both GIRD, gain humerus. In pitchers, correlated suggesting that osseous adaptation humerus significantly contributed findings. this not soft tissue factors played larger role development GIRD Additionally, shoulders This suggests baseline and/or structure pitchers’ Glenohumeral associated status our study. Clinically, study rehabilitation programs including modalities improve may be benefit injuries further research on structural variations is needed. [Table: see text][Table: text]