 It is well described that physical exercise in general is associated with psychological well-being and a reduced risk of morbidity and mortality in non-pregnant women. Several studies have documented that physical exercise during pregnancy is associated with health benefits for both infants and mothers. Physical exercise during pregnancy is associated with a lower risk of pregnancy- and delivery related complications such as preeclampsia, gestational diabetes mellitus, low back pain, preterm delivery, emergency caesarean section and postpartum depression, as well as contributing to improved mood. 