Pelvic Floor Adaptation to a Prenatal Exercise Program: Does It Affect Labor Outcomes or Levator Ani Muscle Injury? A...

Area of Science:

• Obstetrics and Gynecology
• Pelvic Floor Health
• Prenatal Care

Background:

• Physical exercise during pregnancy offers maternal and fetal benefits.
• Pelvic floor adaptations to prenatal exercise are not well-understood.
• This study investigates the impact of a structured exercise program on the pelvic floor.

Purpose of the Study:

• To evaluate pelvic floor adaptations using transperineal ultrasound in response to a prenatal exercise program.
• To assess the association between pelvic floor changes and labor duration and delivery mode.
• To determine the effect of prenatal exercise on levator ani muscle avulsion.

Main Methods:

• Secondary analysis of a randomized controlled trial (NCT04563065) involving pregnant women.
• Participants were randomized into an exercise group or a standard antenatal care control group.
• Transperineal ultrasound measured urogenital hiatus dimensions and pelvic floor function; regression analyses examined associations with labor outcomes.

Main Results:

• The exercise group showed a smaller urogenital hiatus at rest and reduced hiatal contractility.
• No significant differences were found in labor duration or mode of delivery between groups.
• A significant reduction in levator ani muscle avulsion was observed in the exercise group postpartum (20.8% vs. 53.3%).

Conclusions:

• Supervised prenatal exercise can modify pelvic floor morphology and function.
• Prenatal exercise reduces the incidence of levator ani muscle avulsion.
• Prenatal exercise is safe and potentially protective for pelvic floor integrity during pregnancy and postpartum.