Is there a synergistic relationship between diaphragm and pelvic floor muscles in pregnant women?

OBJECTIVE: The aim of this study is to examine whether there is a synergistic relationship between the diaphragm and pelvic floor muscles (PFM) in pregnant women. MATERIAL AND METHODS: Our study was carried out as a cross-sectional study in primigravid pregnants in the second and third trimesters. Superficial electromyography (EMG), 2D/3D ultrasonography (USG), pulmonary function test (PFT), PERFECT, maximum expiratory pressure (MEP) and inspiratory pressure (MIP) measurements were used to evaluate pelvic floor and diaphragm muscle functions during pregnancy. Mann-Whitney U test was used to show the change in the second and third trimesters, and Spearman correlation was used to determine the relationship. RESULTS: No correlation was found between the EMG data of the PFM and diaphragm, or between the USG data of the PFM and diaphragm in all participants, in the second and third trimesters. In the third trimester of the study, diaphragmatic thickness and levator hiatal area (LHA) decreased and both diaphragm and PFM % MVC EMG parameters increased. In the third trimester, FVC, MIP, MEP decreased, and nonsignificant increase in FEV1, FEV1/FVC and peak ekspiratuar flow(PEF) were detected. A significant correlation was found between pelvic floor levator hiatal area USG and FEV1/FVC in both trimesters (r: 0,577p: 0,004). CONCLUSION: There may be a synergistic relationship between the diaphragm and PFM in pregnant women, the relationship may weaken as pregnancy progresses, and there may be no coactivation relationship between the two muscles. In order to prevent the occurrence of pelvic floor dysfunction during pregnancy and to increase the effect of rehabilitation programs, the relationship between the diaphragm and the PFM should be determined and more studies should be conducted.

Is the function of the core muscles affected during pregnancy?

INTRODUCTION AND HYPOTHESIS: The aim of our study is to examine the changes in core muscle functions during pregnancy. METHODS: Our study was carried out in 67 primigravida pregnant women. Superficial electromyography (EMG) and non-invasive 2D/3D ultrasonography (USG) were used to evaluate core muscle (diaphragm, transversus abdominus [TA], internal oblique [IO]-external oblique [EO] muscles, pelvic floor muscles, multifidus) function during pregnancy. Pelvic floor muscle strength was also measured by a digital palpation method (PERFECT system). USG was used to measure expected fetal weight and the diastasis recti (DR) distance. Mann-Whitney U test was used to show changes in trimesters in the core muscles, and Spearman correlation analysis was used to determine the relationship. RESULTS: In the third trimester, an nonsignificant increase in EMG parameters was observed in all of the core muscles. Although a statistically significant decrease was observed in muscle thickness values measured by EO and IO USG in the third trimester, DR was found to increase at all levels (p < 0.005). When we evaluated both trimesters and all pregnant women together, no relationship was found between all core muscles and pelvic floor muscles in the data evaluated by EMG and USG. We found a negative correlation in USG values between fetal weight and IO and the upper part of the rectus abdominus muscle, and a positive correlation between the EMG data of the EO and rectus abdominus muscles. CONCLUSIONS: In women, the coactivation relationship between the core muscles may disappear during pregnancy. As the trimesters progress during pregnancy, a decrease in thickness and an increase in muscle activity can be observed in the core muscles. Pregnant women can be given exercise training for core muscles for protection in both the prenatal and postnatal periods. But more research needs to be done.