Search published articles


Showing 3 results for Dyskinesis
The effect of six weeks of upper extremity perturbation training on eccentric strength of shoulder external rotators and scapula upward rotation in volleyball players prone to upper extremity injury
Ebrahim Soltanabadi, Maliheh Hadadnezhad, Mahdi Khaleghi,
Volume 0, Issue 0 (11-2019)
Abstract
Muscle imbalances in the shoulder are a weakness in the external rotator cuff muscles compared to the internal rotator cuffs, in which the weakness of the external rotator cuff muscles is a risk factor for volleyball players' shoulder injuries. Shoulder dyskinesis can be caused by imbalance of the scapula stabilizing muscles, which improves with muscle coordination the aim of this study was to investigate the effect of perturbation training on eccentric strength of external rotators and scapular kinematics. Twenty-four male volleyball players with a score of less than 30 on CKCUEST test participated in this study, which was randomly divided into two groups of experimental and control. The eccentric strength of the external rotator cuff muscles was measured using an isokinetic at 120 degrees per second. Scapular upward rotation also measured with a dual inclinometer at 45 °, 90 °, 135 ° and the end range of motion of the shoulder abduction. Comparing the experimental and control groups, a significant difference was observed in the shoulder external rotators eccentric strength. There was a significant difference only in 135 ° of scapular upward rotation. In other angles, no significant difference was observed between the two groups. The results showed the positive effect of perturbation training on the eccentric strength of external rotators and scapular upward rotation in arm abduction; therefore, coaches and volleyball players can be advised to add these exercises to their training programs to increase performance and prevent shoulder injuries.
 
Predictive relationship of strength and glenohumeral rotation range of motion with scapular dyskinesis in female athletes with overhead-throwing pattern
L Ghanbari, M.h Alizadeh, H Minoonejad, S.h Hosseini,
Volume 17, Issue 17 (4-2019)
Abstract
Considering the important role of the scapula in the glenohumeral joint movements, its position on the thorax can affect the function of the joint. Therefore, the purpose of this study was to investigate the predictive relationship of the strength and glenohumeral rotation range of motion (ROM) with scapular dyskinesis (SD) in female athletes with overhead-throwing pattern. The present study was a descriptive-correlational research on 60 athletic female in volleyball, handball, basketball and badminton. The Lateral scapular slide test was used to examine SD. the dynamometer and goniometer were used to measure the strength and glenohumeral rotation ROM respectively. Data were analyzed using Spearman correlation and multiple regression tests. The correlation coefficients between SD and the glenohumeral internal rotation ROM (r=-0.734; p=0.000), the glenohumeral external rotation ROM (r=0.693; p=0.001), the glenohumeral internal rotation strength (r=0.674; p=0.005) and the glenohumeral external rotation strength (r=-0.719; p=0.001) were significant. Analysis of the research model showed that about one-third (30.1%) of total changes in SD were dependent on the independent variables mentioned in this regression model. therefore, screening of  athletes with overhead-throwing pattern must be taken into consideration in order to recognize SD, and participate in corrective exercises to increase the glenohumeral internal rotation ROM and the glenohumeral external rotator muscles strength.
 
Electromyographic Analysis Of Shoulder Girdle Muscle In Male Volleyball Players With Different Types Of Scapular Dyskinesia While Performing A Floater Serve
Ehsan Tasoujian, Homman Minoonejad, Mr Mohammad Hossein Alizadeh, Shahrzad Zandi,
Volume 22, Issue 27 (8-2024)
Abstract
Purpose: Volleyball has a high potential for shoulder dyskinesia due to the repetitive nature of it’s movements, so the aim was to investigate electromyography analysis of shoulder girdle muscle in male volleyball players with different types of scapular dyskinesia while performing a floater serve.
Methods: The current research method is the causal-comparative type. 41 volleyball players were selected non-randomly and purposefully and were divided into three groups (n=13 Pattern I, n=13 Pattern II, n=13 without scapulae dyskinesia). Electromyography of serratus anterior, upper, middle, and lower trapezius was evaluated while performing a floater serve using MyoMuscle.
Results:  The results showed that during the acceleration phase of the serving, there was a significant difference in EMG of the upper trapezius (p=0.009) and middle trapezius (p=0.01) between the pattern II and no-dyskinesia, and there was a significant difference in EMG of serratus anterior (p=0.007) and middle trapezius (p=0.01) between the pattern I and no-dyskinesia,
Conclusion: It seems that during the acceleration phase, volleyball players with pattern II experienced an abnormal increase in upper trapezius activity and inhibition of the middle trapezius activity, while probably volleyball players with pattern I experience inhibition the activity of the middle trapezius and serratus anterior.

Page 1 from 1     

© 2025 CC BY-NC 4.0 | Research in Sport Medicine and Technology

Designed & Developed by: Yektaweb