| Autor: |
Vincent HK; a Department of Orthopaedics and Rehabilitation University of Florida, Gainesville Florida and the UF Health Sports Performance Center, University of Florida , Gainesville , FL , USA , and., Chen C; a Department of Orthopaedics and Rehabilitation University of Florida, Gainesville Florida and the UF Health Sports Performance Center, University of Florida , Gainesville , FL , USA , and., Zdziarski LA; a Department of Orthopaedics and Rehabilitation University of Florida, Gainesville Florida and the UF Health Sports Performance Center, University of Florida , Gainesville , FL , USA , and., Montes J; b Florida Generals Lacrosse , Gainesville , FL , USA., Vincent KR; a Department of Orthopaedics and Rehabilitation University of Florida, Gainesville Florida and the UF Health Sports Performance Center, University of Florida , Gainesville , FL , USA , and. |
| Abstrakt: |
The purposes of this research were to quantify the kinematics of the lacrosse shot, based on arm dominance and player experience level. Male players (N = 39; 14-30 years; high school [n = 24], collegiate [n = 9], professional [n = 6]), performed overhead shots using dominant and non-dominant sides. Motion was captured using a high-speed, 12-camera optical system and high-speed filming. Body segment rotational velocities and joint angles were determined at key points in the shot cycle from foot contact (0% of shot) to ball release (100% of shot). All players shot with less anterior trunk lean, less transverse shoulder rotation, and slower trunk-shoulder rotational velocities with the non-dominant side than the dominant side (all p < 0.05). Professional players produced crosse angular velocities 21% faster than high school or collegiate players (p < 0.05). Transverse shoulder rotation range of motion on both dominant and non-dominant and trunk rotation sides was highest in the professional players (p < 0.05). These kinematic features enable professional players to produce faster ball speeds than younger players (138 ± 7 km/h vs. 112 ± 15 km/h, respectively; p < 0.05). Less anterior lean or suboptimal rotation sequence could increase proximal shoulder forces that could contribute to injury as in other throwing sports. |
