Are transversus abdominis/oblique internal and pelvic floor muscles coactivated during pregnancy and postpartum?

Authors

  • Larissa Carvalho Pereira,

    1. Faculty of Medical Sciences of the State University of Campinas (UNICAMP), Campinas, Sao Paulo, Brazil
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  • Simone Botelho,

    Corresponding author
    1. Faculty of Medical Sciences of the State University of Campinas (UNICAMP), Campinas, Sao Paulo, Brazil
    2. Federal University of Alfenas (UNIFAL-MG), Alfenas, Minas Gerais, Brazil
    • Physical Therapist, Physiotherapy Course, Nursing School, Federal University of Alfenas, UNIFAL/MG Street, Av. Jovino Fernandes Sales, 2600 Santa Clara, Alfenas/MG, Brazil Building A, Room 107-D CEP 37130-000, Brazil.
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  • Joseane Marques,

    1. Faculty of Medical Sciences of the State University of Campinas (UNICAMP), Campinas, Sao Paulo, Brazil
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  • Cesar Ferreira Amorim,

    1. Master's program in Physical Therapy/University of City of Sao Paulo (UNICID), Tatuape, Sao Paulo, Brazil
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  • Ana Helena Lanza,

    1. Faculty of Medical Sciences of the State University of Campinas (UNICAMP), Campinas, Sao Paulo, Brazil
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  • Paulo Palma,

    1. Faculty of Medical Sciences of the State University of Campinas (UNICAMP), Campinas, Sao Paulo, Brazil
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  • Cassio Riccetto

    1. Faculty of Medical Sciences of the State University of Campinas (UNICAMP), Campinas, Sao Paulo, Brazil
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  • Mickey Karram led the peer-review process as the Associate Editor responsible for the paper.

  • Conflict of interest: none.

Abstract

Aim

The aim of this study was to simultaneously evaluate both transversus abdominis/internal oblique (Tra/IO) and pelvic floor muscles (PFM) during isometric exercises in nulliparous, pregnant, and postpartum women.

Methods

The study included 81 women divided into four groups: (G1) nulliparous women without urinary symptoms (n = 20); (G2) primigravid pregnant women with gestational age ≥24 weeks (n = 25); (G3) primiparous postpartum women after vaginal delivery with right mediolateral episiotomy (n = 19); (G4) primiparous postpartum women after cesarean section delivery, with 40 to 60 days of postpartum (n = 17). The assessment consisted of simultaneous surface electromyography (EMGs) of the PFM and Tra/IO, during three isometric maximum voluntary contractions.

Results

Only nulliparous women presented significant simultaneous Tra/IO and PFM co-activation when asked to contract PFM (P = 0.0007) or Tra/IO (P = 0.00001).

Conclusions

There is co-activation of the transversus abdominis/internal oblique and the pelvic floor muscles in young, asymptomatic nulliparous women. This pattern was modified in primigravid pregnant and primiparous postpartum women regardless of the delivery mode. Neurourol. Urodynam. 32: 416–419, 2013. © 2012 Wiley Periodicals, Inc.

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