Physical activity during pregnancy and its effects on neonatal outcomes.

Introduction: Despite the acknowledgement that physical activity is beneficial during pregnancy and may result in positive health outcomes for the newborn child few studies have examined this issue. This research was deemed necessary with the primary objective of identifying possible associations between adherence to American College of Sports Medicine recommendations on neonatal outcome variables at birth.

Methods: An observational, longitudinal and prospective study focused on a sample of 70 pregnant women (the power score achieved was estimated to be 0.3). Data was collected in three stages (1st and 2nd trimester of pregnancy and 48 h after delivery). The variables analyzed included the physical activity measurement (with accelerometry), neonatal outcomes at birth and the mother's anxiety, dietary intake, anthropometric measures and socio-demographic and lifestyle.

Results: 21.4% women were active according to physical activity recommendations. There were no significant differences in neonatal outcomes at birth when comparing adherence to physical activity recommendations and the overall activity levels of the mothers. There were also no statistically significant differences in the birth weights of babies born to active and inactive mothers. Mother's anxiety level, weight gained and dietary intake were not statistically different according to compliance with physical activity behaviour or recommendations.

Discussion: There is no relationship between adherence to physical activity recommendations on neonatal outcome variables at birth. There were also no significant associations with sociodemographic and lifestyle variables. There is a need to identify attitudes associated with negative physical activity behavior to reduce the incidence of comorbidities associated with sedentary lifestyles during pregnancy.