Impact of Sport Activity and Physical Exercise on Obstetrical and Perineal Outcomes at Delivery: A Prospective Study

Objective: This study was aimed to investigate the effects of physical activity on perineal outcomes at delivery according to the different levels and types of maternal physical activity before and during pregnancy. Study Design: We prospectively evaluated the obstetrical and perineal outcomes of all consecutive women who delivered at the Del Ponte Hospital, in the period between July 2014 and September 2014. Women were divided into three groups according to the features of physical activity performed before pregnancy: group 1: very sporty women, group 2: moderately sporty women, and group 3: inactive women. A subanalysis of our data was performed based on the specific type of sport activity, on the degree of involvement of perineal muscles during physical activity, and on the continuation/discontinuation of this activity during pregnancy. Results: A total of 135, 84, and 85 women were included in group 1, group 2, and group 3, respectively. The demographic characteristics were comparable among all the groups. Sport activity during pregnancy was more frequent in groups 1 and 2 (59.3 and 53.6%, respectively, vs. 29.4% in group 3; p = 0.003). No differences among groups were detected in terms of perineal outcomes. A lower rate of episiotomy/lacerations ≥ 2nd degree was found among women who practiced sports that specifically involved the perineal muscles and who continued this practice during pregnancy. Conclusion: Perineal outcomes are not influenced by the intensity of sport activity performed before/during pregnancy. Continuous sports during pregnancy that specifically train the perineal muscles are associated with a lower rate of episiotomy and perineal lacerations ≥ 2nd degree.