Cardiorespiratory response to exercise during pregnancy.

@article{Guzmn1970CardiorespiratoryRT,
  title={Cardiorespiratory response to exercise during pregnancy.},
  author={Carlos Alberto Guzm{\'a}n and Rochelle Caplan},
  journal={American journal of obstetrics and gynecology},
  year={1970},
  volume={108 4},
  pages={600-5}
}