Investigation Stability of Upper Limb Function in Handballers with Glenohumeral Internal Rotation Deficit

• Main Authors: Noorollah Javdaneh, Amir Letafat kar, Nazanin Kamrani Faraz, Behnam Shokri
• Format: Article
• Language: fas
• Published: Islamic Azad University, Hamedan Branch 2017-09-01
• Series: Biyumikānīk-i varzishī
• Subjects: Glenohumeral Internal rotation deficit; Shoulder stability; Hanballer
• Online Access: http://biomechanics.iauh.ac.ir/browse.php?a_code=A-10-1-3&slc_lang=en&sid=1
• ISSN: 2476-4906; 2476-5937

Objective: Glenohumeral Internal Rotation Deficit is one of the important risk factors in throwing athletes that can cause adverse effects on glenohumeral joint biomechanics during throwing activity and overhead activity. Methods: In this descriptive study, 30 male student Hanballers (age=18 to 25 years) were categorized into healthy (n=15) and Glenohumeral Internal Rotation Deficit (n=15) groups. Upper quarter y balance test (YBT-UQ) was used for measuring functional instability of dominant shoulder. MANOVA test was run for comparing the performances of the two groups.  Results: In all directions, the stability of the shoulder in Hanballer with Glenohumeral Internal Rotation Deficit was significantly lower than that in the healthy group. Conclusion: Based on the results of this study, functional stability of the unstable shoulder of Hanballers with Glenohumeral Internal Rotation Deficit is lower than the functional stability of the healthy subjects; therefore, we suggest that the upper extremity stabilization exercises, specially the closed kinetic chain exercises be added to the shoulder rehabilitation programs.