Medical Journal of Mashhad university of Medical Sciences

Medical Journal of Mashhad university of Medical Sciences

The Relationship between the Forward Head Angle with Scapular Upward Rotation and Scapulohumeral Rhythm Ratio in Male High School Students

Document Type : Research Paper

Authors
Seyed Hossein Hosseinimehr 1
Seyed Shamsodin Hosseini 2
1 Department of Physical Education and Sport Sciences, Faculty of Humanities and Social Sciences, University of Kurdistan, Sanandaj, Kurdistan, Iran
2 Department of Physical Education and Sport Sciences, Faculty of Humanities and Social Sciences, University of Kurdistan, Sanandaj, Iran
10.22038/mjms.2025.85308.4894
Abstract
Introduction: Forward head disorder increases the effect of gravity on the head, overextension of the head in the occipital atlas joint, flexion of the neck on the chest, and weakness of the neck flexors. The present study investigated the relationship between the amount of forward head with scapular upward rotation and the scapulohumeral rhythm ratio in male high school students.
Materials & Methods: Sixty male high school students with an age range of 14-19 years were randomly selected as a statistical sample. The amount of forward head angle was measured by photographing the body's profile view. One inclinometer was used to measure shoulder elevation and another inclinometer was used to measure scapular upper rotation at 45, 90, and 135 degrees of shoulder abduction on the frontal plane. Pearson's correlation coefficient test was used to check the correlation between research variables.
Results: findings indicated there was a positive and significant relationship between the amount of head forward and the scapular upper rotation in the angles of 135 degrees shoulder abduction (r=- 0.26, p=0.04) and from 90 to 135 degrees shoulder abduction (r= 0.30, p=0.01). Also, there was a negative and significant relationship between the amount of head forward and the scapulohumeral rhythm ratio in 0 to 135 degrees (r= 0.25, p=0.04), 45 to 90 degrees (r= 0.26, p=0.04), and 90 to 135 degrees of shoulder abduction (r= 0.38, p=0.003).
Conclusion: This study's results emphasize the importance of proper spine alignment and craniovertebral angle to prevent shoulder complex disorders.
Keywords
forward head
scapular upper rotation
scapulohumeral rhythm ratio
male high school students
Subjects
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Medical Journal of Mashhad university of Medical Sciences
Volume 68, Issue 2
January and February 2025
Pages 427-436