@article{silva_boing_2021,  title={Prevalence of physical activity and associated factors among pregnant women: a cross-sectional population-based study in southern Brazil},  volume={21},  ISSN={1519-3829},  url={https://doi.org/10.1590/1806-93042021000300011},  DOI={10.1590/1806-93042021000300011},  number={3},  journal={Revista Brasileira de Saúde Materno Infantil},  publisher={Instituto de Medicina Integral Prof. Fernando Figueira},  author={Silva, Vilson Rodrigues da and Boing, Antonio Fernando},  year={2021},  month={Jul},  pages={925–934} }