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. 2014 Apr 23;12:104. doi: 10.1186/1479-5876-12-104

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Copyright © 2014 Keller et al.; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Individual changes in peak measures of VO2 (A), O2pulse (B), work (C) and Ve (D) from Test 1 to Test 2. Subjects’ whose VO₂peak did not decrease during Test 2 showed a decrease in VO₂@VT.