Mens JMA, et al. – This observational study aims to examine the contraction pattern of an important muscle that provides a compressive force, i.e. the transverse abdominal muscle (TrA), during a load transfer test, such as active straight leg raising (ASLR). During ASLR, significant excessive contraction of the TrA is present in patients with long–lasting pregnancy–related posterior pelvic girdle pain (PGP). This does not support the notion that contraction of the TrA is decreased in long–lasting pregnancy–related PGP. This indicates that in patients with long–lasting pregnancy–related PGP, there is no rationale for the prescription of exercises to enhance contraction of TrA.