Journal of The Korean Society of Physical Medicine

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Table. 4.

Differences in muscle activity during exercise with or without shoulder external rotation

Variable muscle Apply Exercise Program t(p)
Neutral Combined
Y ex. UT 47.27 ± 19.83 35.96 ± 20.04 t = -1.269
p = .221
MT 55.98 ± 10.63 69.02 ± 14.8 t = 2.261
p = .036*
LT 60.25 ± 13.19 68.99 ± 15.03 t = -1.383
p = .185
W ex. UT 21.57 ± 10.41 17.31 ± 11.37 t = -.874
p = .394
MT 46.43 ± 13.78 73.23 ± 13.95 t = 4.323
p = < .001**
LT 51.61 ± 15.53 54.1 ± 19.58 t = .314
p = .757
T ex. UT 48.53 ± 17.67 30.7 ± 18.61 t = -2.196
p = .041*
MT 57.98 ± 14.28 72.3 ± 11.79 t = 2.444
p = .025*
LT 40.38 ± 12.77 57.76 ± 12.92 t = 3.022
p = .007**

UT: upper trapezius; MT: middle trapezius; LT: lower trapezius :

* p < .05, ** p < . 01

J Korean Soc Phys Med 2024;19:87-101 https://doi.org/10.13066/kspm.2024.19.4.87
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