Does research support the current conservative care recommendations for pregnancy-related diastasis rectus abdominis? A scoping review

Abstract

Pregnancy-related diastasis rectus abdominis (DRA) is a widespread condition. The current evidence for its conservative management is contradictory, as are the criteria for making a diagnosis, which has stimulated debate among practitioners. The aim of this scoping review was to synthesize the existing peer-reviewed literature to determine whether there is evidence to support or refute recently published recommendations for the conservative care of perinatal DRA. These guidelines suggest that it should be approached from the perspective of considering the linea alba (LA) as an integrative component of the thoracopelvic abdominal system, which assumes functional relationships between the structures of the thorax and pelvis. Specifically, the present authors explored whether relationships exist between: (1) the LA and breathing mechanics; (2) pelvic floor muscle (PFM) function; (3) lumbopelvic pain (LPP) control; and (4) aspects of the structure and function of the abdominal wall. Of the 31 studies included, none were found relating to the LA and breathing mechanics, 11 investigated PFM function, 10 explored LPP, and 18 examined the LA with respect to the structure and/or function of the abdominal wall. The research reviewed does not appear to substantiate several of the recommendations for the conservative care of DRA, but does align with cited gaps in knowledge about this condition. The studies included neither support nor necessarily refute the relationships between breathing, PFM function and LPP. This scoping review also highlights the limitations of the current characterization of DRA and related assessment strategies, particularly the reliance on heterogeneous measurements of inter-recti distance as the primary and sometimes only measurement to inform clinical reasoning with respect to the condition.