Spiking Kinematics in Volleyball Players With Shoulder Pain

• Main Authors: Yuan-Ching Wang, 王元慶
• Other Authors: Yi-Fen Shih
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/68649433369172019640

碩士 === 國立陽明大學 === 物理治療暨輔助科技學系 === 100 === Background: Spiking is one of the most important scoring techniques in modern volleyball games. Eighty percent of shoulder pain in volleyball players are caused by spiking. In all volleyball injuries, players with shoulder pain lead to the longest time loss of practices and competitions. There are three risk factors for shoulder injuries in volleyball players: glenohumeral internal rotation deficit, scapula dyskinesis and the change of spiking biomechanics (kinematics and kinetics). Most of previous studies investigated static measurement and kinematic analysis of spiking movement in healthy athletes. There is no study examing shoulder kinematics during spiking movement in injured players. Purpose: The purpose of this study was to investigate the differences of glenohumeral joint, scapula, and trunk movements during spiking between volleyball players with and without shoulder pain. Materials and Methods: Twenty university volleyball league players with shoulder pain and 20 gender-age-experience matched control subjects were recruited in this study. All subjects undertook physical examinations such as, shoulder range of motion (ROM) and muscle strength tests. The kinematic measurement of upper extremity during spiking was carried out using an electromagnetic tracking system. The spiking tasks were performed in the laboratory setting. The volleyball was suspended on a wooden stick and the height of ball was chosen by each subject. The subject was asked to attack two target areas (40 cm × 40 cm) located 3 meters in front of the subject for five times. The study was approved by the ethical committee of National Yang-Ming University, Taipei (IRB number 1000091). Statistical analysis: The descriptive statistics were used to describe the basic data of all subjects and the two-way analysis of variance (2-way ANOVA) was used to analyze the difference of dependent variables between the experimental and the control group. The level of significance was set at α＝0.05. Results: Subjects with shoulder pain demonstrated less glenohumeral horizontal adduction angle at 2 events: at ball contact (P = 0.001) and at the occurrence of maximum glenohumeral external rotation (P = 0.039) as compared to the controls. Besides, subjects with shoulder pain demonstrated less scapular posterior tilting (P = 0.032) and less scapular upward rotation (P = 0.014) in the injured group at the moment of ball contact. Conclusion: Decrease in glenohumeral horizontal adduction and scapular posterior tilt and upward rotation were associated with shoulder pain in university volleyball players, which should be addressed in training and treatment of young volleyball players.