The Korean Journal of Sports Medicine

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Table. 1.

Table. 1.

Electromyographic activities of six muscles according to the body and shoulder position

Sitting SS SRS DSS DSSR
W position
AD 14.8±8.4 13.8±8.9 15.2±9.0 13.8±7.7 10.8±4.3
MD 13.6±10.2 12.0±6.3 14.7±10.0 13.5±8.0 12.5±8.2
UT 29.7±11.9 27.2±14.3 25.6±16.0 30.3±17.5 24.9±16.6
LT 68.7±22.6 65.0±26.1 81.1±30.0 68.2±16.0 63.1±25.8
SA 27.2±13.4 32.1±16.2 36.8±17.1 35.7±19.2 34.9±21.4
IS 50.4±17.8 57.0±23.5 68.1±21.8 57.7±17.3 57.2±21.0
90/90 position
AD 17.5±9.3 18.9±8.1 19.2±7.1 18.9±8.6 14.4±5.9
MD 31.4±17.8 35.1±21.0 31.4±19.4 35.8±20.5 30.5±20.0
UT 47.8±19.1 54.8±18.4 51.1±26.0 56.0±16.3 50.2±20.7
LT 82.3±20.2 82.7±21.7 85.1±22.6 73.6±13.1 75.5±17.5
SA 57.4±23.0 56.6±18.5 57.0±16.7 58.6±18.9 50.2±19.3
IS 68.5±14.6 79.0±23.8 89.0±23.2 71.3±14.8 71.5±17.6

Values are presented as mean±standard deviation.

SS: static squat, SRS: static rotational squat, DSS: dynamic squat to standing, DSSR: dynamic squat to standing and trunk rotation, AD: anterior deltoid, MD: middle deltoid, UT: upper trapezius, LT: lower trapezius, SA: serratus anterior, IS: infraspinatus.

Korean J Sports Med 2020;38:199-207 https://doi.org/10.5763/kjsm.2020.38.4.199
© 2020 Korean J Sports Med