1. Physical activity and exercise during pregnancy and the postpartum period. Committee opinion no;Obstetricians ACo, Gynecol GJO;650.,2015
2. Physical activity;WHO,2018
3. Findings from the Global Burden of Disease Study 2017;(IHME) IfHMaE,2017
4. Physical activity;WHO,2018
5. Guidelines for physical activity during pregnancy: comparisons from around the world;Evenson;Am. J. Lifestyle Med.,2014