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J Phys Ther Sci. 2014 Oct;26(10):1551-2. doi: 10.1589/jpts.26.1551. Epub 2014 Oct 28.

Influence of Wearing a Brassiere on Pain and EMG Activity of the Upper Trapezius in Women with Upper Trapezius Region Pain.

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Department of Physical Therapy, Jeonju University, Republic of Korea.
Department of Physical Therapy, College of Biomedical Science and Engineering, Inje University, Republic of Korea.


[Purpose] This study examined the effect of wearing a brassiere on upper trapezius (UT) region pain and EMG activity during arm elevation by women. [Subjects and Methods] Fourteen healthy women were recruited. Surface EMG data were collected from the UT muscles during arm elevation. Pressure pain in the UT region was measured using a baseline dolorimeter. [Results] The EMG activity of the UT increased significantly when a brassiere was worn compared to without. UT region pain showed no significant difference between with and without wearing a brassiere. [Conclusion] This suggests that wearing a brassiere increases the muscle activation of the UT in women.


Brassiere; EMG; Upper trapezius

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