Comparison scapular dyskinesia between volleyball and basketball elite athletes
Oral Presentation XML
Authors
1Master student of Corrective Exercises and Sports Injuries, faculty of physical education and Sport Sciences, University of Guilan, Rasht, Iran.
2Professor Department of Corrective Exercises and Sports Injuries, Faculty of Physical Education and Sport Sciences, University of Guilan, Rasht, Ira
3Assistant Professor, Department of Sport Biomechanics, faculty of Physical Education and Sport Sciences, Islamic Azad university, Central, Tehran branch, Tehran, Iran
Abstract
The shoulder is one of the most useful joint in overhead sports. Scapular dyskinesia is specified by observable changes in scapular position and motion patterns leads to alterations in performance of the scapula. Incompatible scapular conditions increase stress on the tissues surrounding the shoulder joint. Scapular dyskinesia has been thought to affect on normal scapulohumeral rhythm and shoulder girdle arthrokinematics, and therefore, it has figure in detection of abnormalities which related to this pathology.
Comparison scapular dyskinesia between volleyball and basketball elite athletes
80 male athlete was participated in this study that divided in two group, 40 volleyball players (age 23.4±3.1 years, height 189±9.1 cm, weight80.6±8.8 kg) and 40 basketball players (age 22.4±2.9years, height 185±5.9 cm, weight79.3±7.4 kg). Participants classified with obvious scapular dyskinesis during the weighted abduction and flexion task of the scapular dyskinesis test. Scapular position assessed by lateral scapular slide test at 3 positions (rest, 45°and 90°). The range of motion was measured with goniometer, strength with Dynamometer, and scapulohumeral rhythm at 4 positions (0, 45°, 90°, and 135°) with inclinometer. Kolmogorov-Simonov, used for study of data normality, independent T test was used for analyze group differences.
There was significant difference between the scapulohumeral rhythm at all positions between volleyball and basketball players (P=0.001). There were significant difference between groups the range of dominant hand internal rotation (P=0.004) and dominant hand external rotation (P=0.03).There was no significant difference between groups the range of the non-dominant hand external rotation (P=0.19) and non-dominant hand internal rotation (P=0.264). Also, this result shown significant difference between groups, strength internal and external rotation in dominant (p=0.001) (p=0.004) and non-dominant hand (p=0.001).
The differences in movement patterns in volleyball and basketball can affected the variables and differences obtained. Results shown degrees of external rotation strength is less than internal rotation strength that may increase shoulder injury. Also repetitive and high-intensity throwing movements by applying small, continuous pressures on the shoulder articular capsule cause the posterior articular capsular stiffness, resulting a difference in range of motion, and lower internal rotation than external rotation.
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