Physical Therapy Korea
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Data of mean ± standard deviation values of muscle activity (%RVC) during KPP and FPK

Variables Muscle activity (%RVC) t p-value

KPP FPK
Serratus anterior 70.36 ± 59.08 96.96 ± 76.06 –2.482 0.024*
Lower trapezius 14.46 ± 11.47 18.24 ± 14.30 –3.127 0.006*
Upper trapezius 17.04 ± 12.95 17.83 ± 12.83 –1.034 0.315
Pectoralis major 46.69 ± 66.64 38.78 ± 43.84 1.147 0.267

RVC, reference voluntary contraction; KPP, knee push-up plus; FPK, flexi-bar exercise prior to knee push-up plus. *Indicates a significant difference (p < 0.05).

Phys. Ther. Korea 2021;28:256~265 https://doi.org/10.12674/ptk.2021.28.4.256
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