Abshenas E, Karimi Zadeh Ardakani M, Takhtaei M, Naderi Beni M. Comparison of Functional Stability of Shoulder Girdle Between Individuals With Symmetric and Asymmetric Scapula. PTJ 2020; 10 (2) :99-106
URL:
http://ptj.uswr.ac.ir/article-1-432-en.html
1- Department of Health and Sport Medicine, Faculty of Physical Education and Sport Sciences, University of Tehran, Tehran, Iran.
2- Department of Motor Behavior, Faculty of Physical Education and Sport Sciences, University of Tehran, Tehran, Iran.
Abstract: (2871 Views)
Purpose: Changes in the position of the scapula due to its multiple roles, including acting as a muscle binding site and stabilization in this area can reduce the physiological and biomechanical efficiency of the shoulder, which ultimately increases shoulder injury. Therefore, the purpose of this study was to compare the functional stability of shoulder girdle between asymmetric and symmetric scapula.
Methods: This was conducted on 156 male students in Tehran who were selected by purposeful cluster and enrolled in the research after obtaining informed consent. Kibler test was used to examine the symmetry of the scapula; 78 subjects had symmetrical and 78 asymmetrical scapula. We used Davis and Y tests to evaluate the stability of the shoulder girdle. To study the difference between groups, an independent t-test was used at a significant level of P≤0.05 using SPSS software.
Results: The mean scores of the two groups in the Davis test were significant (P=0.0001) and also there was a significant difference between the symmetric and asymmetrical scapular groups in the normalized scores of each direction and the combined score of each hand (P=0.0001).
Conclusion: Asymmetry of the scapular bones due to disruption of the position of the scapula, and consequently a decrease in functional stability and quality of the optimal function can be considered to predict shoulder injuries.
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●Functional stability of the shoulder girdle in symmetric scapular people was better than scapular asymmetry.
● Disruption of the scapular poFunctional stability of the shoulder girdle in symmetric scapular people was better than scapular asymmetry people.
● Disruption of the scapular position decreases functional stability and optimal performance quality in this area.
● Asymmetry in the scapulae can be examined to predict shoulder injuries because of the decrease of functional stability and quality of the optimal function.
Plain Language Summary
The shoulder girdle is a complex musculoskeletal system that is necessary for body function and movement. The position of the scapula bone plays an important role in producing smooth and coordinated shoulder girdle movements Change of scapula position and its displacement in bad posture can cause weakness in the shoulder area and reduce the stability of this area. In addition, the position of the scapula is directly related to the production of muscle forces and the range of motion of the shoulder girdle. Decreasing the asymmetry of the scapula position indicates an increased role of the scapular muscle stabilizer in controlling the approaching motion of the scapula. Therefore, as a result of scapula displacement, the probability of the functional stability reduces and the likelihood of subsequent injury increases. This study compares functional stability of shoulder girdle between Individuals with symmetric and asymmetric scapula people. Results indicate that the functional stability of the shoulder girdle in symmetric scapular group was better than those in asymmetric scapular group. Functional stability of the shoulder girdle has been evaluated in a variety of problems including shoulder pain, shoulder instability and even some musculoskeletal abnormalities such as round shoulder.
Type of Study:
Applicable |
Subject:
General Received: 2020/01/12 | Accepted: 2020/05/18 | Published: 2020/07/9