Pregnant women may exercise both abdominal and pelvic floor muscles during pregnancy without increasing the diastasis recti abdominis: a randomised trial

Question: What is the effect of a 12-week abdominal and pelvic floor muscle exercise program during pregnancy on the inter-recti distance (IRD) in women with diastasis recti abdominis immediately after the 12-week intervention period and at follow-up 6 weeks postpartum? Design: An exploratory, parallelgroup, randomised controlled trial with concealed allocation, assessor blinding and intention-to-treat analysis. Participants: Ninety-six pregnant women aged >= 18 years, either primigravida or multigravida, in gestation week 24 with an IRD of >= 28 mm measured at rest and/or a protrusion on initial assessment. Intervention: The experimental group participated in a 12-week abdominal and pelvic floor muscle exercise program during pregnancy. The control group received no intervention. Outcome measures: Change (mm) in IRD 2 cm above and below the umbilicus at rest from pre-intervention to immediately post-intervention and to 6 weeks follow-up measured with ultrasonography. Results: The IRD increased for both groups from baseline to immediately after the intervention and decreased from after the intervention to the follow-up at 6 weeks postpartum. The IRD was smallest for both groups at the follow-up. At 2 cm above the umbilicus, the intervention effect was 2 mm (95% CI -2 to 7) immediately after the intervention and -1 mm (95% CI -4 to 3) at follow-up. At 2 cm below the umbilicus, the intervention effect was -5 mm (95% CI -10 to 0) immediately after the intervention and 0 mm (95% CI -4 to 4) at follow-up. Conclusion: Abdominal and pelvic floor muscle training during pregnancy have a negligible effect on the IRD immediately after 12 weeks of intervention and at 6 weeks post-partum. Registration: NCT04960800. [Theodorsen N-M, B & oslash; K, Fersum KV, Haukenes I, Moe-Nilssen R (2024) Pregnant women may exercise both abdominal and pelvic floor muscles during pregnancy without increasing the diastasis recti abdominis: a randomised trial. Journal of Physiotherapy 70:142-148] (c) 2024 Australian Physiotherapy Association. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).