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. 2017 May 12;22(4):687–695. doi: 10.1177/2156587217707143

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© The Author(s) 2017

This article is distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 License (http://www.creativecommons.org/licenses/by-nc/4.0/) which permits non-commercial use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage).

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Figure 3. — Intestinal pressure: (a) during normal breathing in the 2 to 2.5 (0.5) mm Hg range; (b) during deep breathing with abdomen retraction on exhalation in the 2.5 to 3 (0.5) mm Hg range; (c) during performing breathing exercise with abdomen retraction on exhalation in the 9 to 12 (3) mm Hg range; and (d) during abdomen retraction after exhaling, which changed in the 20.5 to 24.3 (5) mm Hg range. Abdomen retraction was performed after exhalation, after which the subject conducted 3 normal respiration cycles. These are representative graphs of a single subject from each group.