標槍選手肩胛骨活動與肌肉活化之關係

Purpose: To measure scapular movement and calculate the shoulder range of motion in javelin throwers. Method: Five division 1 college javelin throwers were recruited in this study. Electromagnetic motion capture system was used to capture the shoulder abduction from 0 degree to end range of abduction in the step of 10 degree. The angle between humerus and trunk (A_HT) and the angle between scapula and trunk (A_ST) were calculated. Results: Both in the dominant and non-dominant sides, the A_HT was similar to the abduction angle at each abduction position. The A_ST was less than 5 degrees in both sides and was larger in the dominant side at the different abduction positions. A positive correlation existed between A_HT and A_ST in both sides of javelin throwers. In dominant side, the relationship was close to linear relation, however, the relationship was close to quadratic relation. Conclusion: The movements of humerus and scapula were different between dominant and non-dominant sides in javelin throwers.