Maternal organism suffers physiological and biomechanical changes during pregnancy, including the separation of rectus abdominis muscles (RAM). This cross-sectional study aimed to compare the distance between the RAM among sedentary and active primiparous women who had vaginal childbirth and cesarean section, to correlate RAM separation with maternal and child variables and to compare these variables between primiparous women with and without RAM diastasis. In total, 56 women were evaluated in their ninth postpartum week, divided into four groups according to the mode of delivery and the practice of resistance exercises. RAM distance was calipered in the supraumbilical, umbilical, and infraumbilical regions. The values obtained were verified via analysis of variance (ANOVA), Pearson’s correlation, and independent t-test. We found no main effect between mode of delivery and practice of resistance exercises or interaction between mode of delivery and practice of resistance exercises (p≥0.118) for RAM distance. We found significant correlation between body weight before pregnancy and RAM distance (p<0.001). There was no association between body weight gain during pregnancy and the newborn’s weight with RAM distance (p≥0.132). We observed significant difference in body weight before pregnancy between primiparous women with and without RAM diastasis (p<0.005). We found no differences between groups regarding body weight gain during pregnancy and the newborn’s weight (p≥0.122). It was concluded that the practice of resistance exercises and the mode of delivery have no impact on the separation of supraumbilical, umbilical, and infraumbilical regions of RAM in primiparous women.
RESUMO O organismo materno sofre alterações fisiológicas e biomecânicas durante a gestação, dentre elas o afastamento dos músculos retos do abdome (MRAs). Os objetivos deste estudo transversal foram: comparar a distância entre os MRAs entre primíparas treinadas e sedentárias que realizaram parto vaginal e cesárea; correlacionar o afastamento dos MRAs com variáveis materno-infantis; e comparar essas variáveis entre primíparas com e sem diástase dos MRAs. Foram avaliadas 56 mulheres na nona semana pós-parto, divididas em quatro grupos de acordo com o tipo de parto e a prática de exercício resistido. A distância entre os MRAs foi mensurada com paquímetro nas regiões supraumbilical, umbilical e infraumbilical. Os dados foram submetidos à análise de variância (Anova), correlação de Pearson e teste t independente. Não houve efeito do tipo de parto, da prática de exercício resistido ou da interação tipo de parto e prática de exercício resistido (p≥0,118) para a distância entre os MRAs. Houve correlação significativa entre peso antes da gestação e distância entre os MRAs (p<0,001). Não houve associação entre ganho de peso na gestação e peso do bebê com a distância entre os MRAs (p≥0,132). Houve diferença significativa no peso antes da gestação entre primíparas com e sem diástase dos MRAs (p<0,005). Não houve diferença entre grupos no ganho de peso na gestação e no peso do bebê (p≥0,122). Conclui-se que a prática de exercício resistido e o tipo de parto não têm impacto no afastamento entre os MRAs nas regiões supraumbilical, umbilical e infraumbilical em primíparas.
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