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. 2017 Feb 24;12(2):e0172804. doi: 10.1371/journal.pone.0172804

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© 2017 Smuck et al

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Fig 4 — A side-by-side comparison of the established VO₂ -derived intervals that measure physical activity (bottom row) alongside the new pain-derived intervals that measure physical performance (top row) as uncovered in Fig 3.