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. 2020 Feb 19;10:2891. doi: 10.1038/s41598-020-59598-9

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Renal function parameters during 1-h pool and land walking activities in 15 pregnant women. Differences between plasma renin activity levels and serum aldosterone levels before and after each activity (a,b). Total urine volume and creatinine clearance measured after 1-h pool and land walking activities (c,d). For total urine volume and creatinine clearance, data were available for 14 participants. Statistical analyses were as follows: (a,b) Wilcoxon signed-rank test and (c,d) Wilcoxon rank-sum test. The bars show the means and standard deviations.