Editing Exercise (section)

=== Respiratory system ===
People who participate in physical exercise experience increased cardiovascular fitness.{{medical citation needed|date=May 2022}}
There is some level of concern about additional exposure to air pollution when [[Outdoor fitness|exercising outdoors]], especially near traffic.<ref name="Laeremans et al. 2018">{{cite journal | vauthors = Laeremans M, Dons E, Avila-Palencia I, Carrasco-Turigas G, Orjuela-Mendoza JP, Anaya-Boig E, Cole-Hunter T, DE Nazelle A, Nieuwenhuijsen M, Standaert A, VAN Poppel M, DE Boever P, Int Panis L | display-authors = 6 | title = Black Carbon Reduces the Beneficial Effect of Physical Activity on Lung Function | journal = Medicine and Science in Sports and Exercise | volume = 50 | issue = 9 | pages = 1875–1881 | date = September 2018 | pmid = 29634643 | doi = 10.1249/MSS.0000000000001632 | hdl-access = free | s2cid = 207183760 | hdl = 10044/1/63478 }}</ref>