TY - JOUR AU - Thomas, Stephen John A2 - Thomas, Stephen John A2 - Swanik, Kathleen A. A2 - Swanik, Charles A2 - Kelly, John D. IV DB - BISp DP - BISp KW - Baseballspiel KW - Bewegungsumfang KW - Gelenkbeweglichkeit KW - Innenrotation KW - Leistungssport KW - Orthopädie KW - Schulterblatt KW - Schultergelenk KW - Sporttraumatologie KW - Untersuchung, empirische LA - eng TI - Internal rotation and scapular position differences : a comparison of collegiate and high school baseball players TT - Unterschiede bei Innenrotation und Schulterblattposition : ein Vergleich von College- und Highschool-Baseballspielern PY - 2010 N2 - Context: Conditions such as labral and rotator cuff injuries have been linked with decreases in glenohumeral internal-rotation and increases in external-rotation motion. Also, decreased glenohumeral internal rotation is strongly associated with scapular dyskinesis. Objective: To compare healthy collegiate and high school baseball players' glenohumeral joint range of motion and scapular position. Design: Cross-sectional study. Setting: Institutional research laboratory. Patients or Other Participants: Thirty-one male National Collegiate Athletic Association Division I collegiate (age = 20.23 ± 1.17 years, height = 186.24 ± 5.73 cm, mass = 92.01 ± 7.68 kg) and 21 male high school baseball players (age = 16.57 ± 0.76 years, height = 180.58 ± 6.01 cm, mass = 79.09 ± 11.51 kg). Main Outcome Measure(s): Glenohumeral internal and external rotation and scapular upward rotation were measured with a digital inclinometer. Scapular protraction was measured with a vernier caliper. All variables except scapular upward rotation were calculated as the difference between the dominant and nondominant sides. Results: Collegiate baseball players had more glenohumeral internal-rotation deficit (4.80°, P = .028) and total motion deficit (5.73°, P = .009) and less glenohumeral external-rotation gain (3.00°, P = .028) than high school players. Collegiate baseball players had less scapular upward rotation than high school players at the 90° (4.12°, P = .015, versus 3.00°, P = .025) and 120° (4.00°, P = .007, versus 3.40°, P = .005) positions. The scapular protraction difference was greater in collegiate baseball players than in high school players in the hands-on-hips and 90° positions (0.77 cm, P = .021, and 1.4 cm, P = .001). Conclusions: When comparing high school with collegiate baseball players, these data suggest that glenohumeral internal-rotation deficit and scapular position change as the level of competition increases. Verf.-Referat L2 - http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2808753/pdf/i1062-6050-45-1-44.pdf L2 - https://dx.doi.org/10.4085/1062-6050-45.1.44 DO - 10.4085/1062-6050-45.1.44 SP - S. 44-50 SN - 1062-6050 JO - Journal of athletic training IS - 1 VL - 45 M3 - Elektronische Ressource (online) M3 - Gedruckte Ressource ID - PU201009007321 ER -