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. 2018 Mar 5;8(3):e018697. doi: 10.1136/bmjopen-2017-018697

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© Article author(s) (or their employer(s) unless otherwise stated in the text of the article) 2018. All rights reserved. No commercial use is permitted unless otherwise expressly granted.

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Cycle ergometry-based reference values for relative V̇O_2peak of females compared between three studies. PF Registry, SHIP Study³⁶ and FRIEND Study.³⁵ 25th, 50th and 75th percentiles are plotted. For the FRIEND Study, only the 50th percentile is plotted. FRIEND, Fitness Registry and the Importance of Exercise National Database; PF, Prevention First; SHIP, Study of Health in Pomerania; V̇O_2peak, peak oxygen uptake.