Inclusion Criteria:  healthy pregnant women in gestation week 25 presenting with an inter-rectus distance of 28 mm or more at the level of the umbilicus, and/or 2 cm above and below the umbilicus at rest on initial assessment. Participants presenting with a protrusion along the Linea Alba will also be included, even if they do not meet the inclusion criteria with an inter-rectus distance of 28 mm or more Both primi- and multigravida women will be included, and there will be no limitations on number of fetuses  Exclusion Criteria:  pregnancies where exercise is contraindicated serious illnesses regarding both mother and fetus inability to understand Scandinavian languages failure to complete and present an informed consent form presence of chronic physical or mental illness incompatible with the intervention  Exclusion criteria during the study period is stillbirth or premature birth before gestation week 37; onset of serious illnesses regarding both mother and foetus; and pregnancies where exercise is contraindicated