Effect of the Spacing of Backpack Shoulder Straps on Cervical Muscle Activity, Acromion and Scapular Position, and Upper Trapezius Pain

[Purpose] This study investigated the effect of the spacing of backpack shoulder straps on cervical muscle activity, acromion and scapular position, and upper trapezius (UT) pain. [Subjects] Fourteen males aged 20–32 years, were recruited. [Methods] We measured the MPS (midcervical paraspinal) activ...

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Detalles Bibliográficos
Autores principales: Kim, Min-hee, Yoo, Won-gyu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Society of Physical Therapy Science 2013
Materias:
Original
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3805011/
https://www.ncbi.nlm.nih.gov/pubmed/24259829
http://dx.doi.org/10.1589/jpts.25.685
Descripción
Sumario:[Purpose] This study investigated the effect of the spacing of backpack shoulder straps on cervical muscle activity, acromion and scapular position, and upper trapezius (UT) pain. [Subjects] Fourteen males aged 20–32 years, were recruited. [Methods] We measured the MPS (midcervical paraspinal) activity, acromial angle, scapular distance, and UT pain after gait carrying a backpack with different shoulder strap spacings. [Results] The MPS, scapular inferior distance, and UT pressure pain threshold was significantly decreased and the acromion angle was significantly increased when carrying a backpack with wide shoulder straps compared to narrow shoulder straps. [Conclusion] A backpack with wide shoulder straps may cause scapular depression syndrome and chronic UT pain.

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