Impact of different body positions on bioelectrical activity of the pelvic floor muscles in nulliparous continent women

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Abstract

We examined pelvic floor muscles (PFM) activity (%MVC) in twenty nulliparous women by body position during exercise as well as the activation of abdominal muscles and the gluteus maximus during voluntary contractions of the PFMs. Pelvic floor muscle activity was recorded using a vaginal probe during five experimental trials. Activation of transversus abdominis, rectus abdominis, and gluteus maximus during voluntary PFM contractions was also assessed. Significant differences in mean normalized amplitudes of baseline PFM activity were revealed between standing and lying (P < 0.00024) and lying and ball-sitting positions (P < 0.0053). Average peak, average time before peak, and average time after peak did not differ significantly during the voluntary contractions of the PFMs. Baseline PFM activity seemed to depend on the body position and was the highest in standing. Pelvic floor muscles activity during voluntary contractions did not differ by position in continent women. Statistically significant differences between the supine lying and sitting positions were only observed during a sustained 60-second contraction of the PFMs.

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Chmielewska, D., Stania, M., Sobota, G., Kwas̈na, K., Błaszczak, E., Taradaj, J., & Juras, G. (2015). Impact of different body positions on bioelectrical activity of the pelvic floor muscles in nulliparous continent women. BioMed Research International, 2015. https://doi.org/10.1155/2015/905897

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