Taking moderate-intensity exercise three times a week during the second and third trimester of pregnancy halves the risk of having a high birth weight newborn (babies with macrosomia, that is, weighing over 4 kilos) and, therefore, the risk of needing a caesarean delivery.
Exercising during pregnancy reduces the risk of high birth weight newborns and of Caesarean delivery, study suggests
R. Barakat, M. Pelaez, C. Lopez, A. Lucia, J. R. Ruiz. Exercise during pregnancy and gestational diabetes-related adverse effects: a randomised controlled trial. British Journal of Sports Medicine, 2013; 47 (10): 630 DOI: 10.1136/bjsports-2012-091788