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. 2022 Aug 30;23:823. doi: 10.1186/s12891-022-05771-2

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© The Author(s) 2022

Open AccessThis 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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/. 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 in a credit line to the data.

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Fig. 6 — The scatter plots show the relationships among the PPP, PPG, and PGA in three walking durations at two walking durations. A PPP versus PPG at 10 min walking duration. B PPP versus PGA at 10 min walking duration. C PPG versus PGA at 10 min walking duration. D PPP versus PPG at 20 min walking duration. E PPP versus PGA at 20 min walking duration. F PPG versus PGA at 20 min walking duration. PPP, peak plantar pressure; PPG, peak pressure gradient; PGA, pressure gradient angle; T1, first toe; M1, first metatarsal head; M2, second metatarsal head; and HL, heel. *, a significant correlation (p < 0.05); **, a significant correlation (p < 0.01)