RT Journal Article SR Electronic T1 The Impact of Smoking on Maximum Oxygen Uptake JF Respiratory Care FD American Association for Respiratory Care SP 857 OP 861 DO 10.4187/respcare.08406 VO 66 IS 5 A1 Sengbusch, Julia R A1 Tiernan, Delaney L A1 Tamulevicius, Nauris A1 Martinasek, Mary P YR 2021 UL http://rc.rcjournal.com/content/66/5/857.abstract AB BACKGROUND: This systematic literature review summarizes the impact of smoking on maximal oxygen uptake (maximum ).METHODS: Full-text articles were retrieved if the abstract met the assigned criteria. A total of 9 articles were included in the final review based on the inclusion and exclusion criteria. These included articles assessed the effects of tobacco smoking on maximum values.RESULTS: Half of the articles reported a significant difference in maximum scores between smokers and nonsmokers, with smokers having a lower maximum . The other half of the articles did not identify significant differences between smokers and nonsmokers. One study found a significant difference in maximum in only one age group (ie, 20–29 y), but not any of the other age groups.CONCLUSIONS: More research is needed on the effects of smoking on maximum to better understand any relationships or causations.