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. 2022 Mar 22;12:4882. doi: 10.1038/s41598-022-08801-0

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© The Author(s) 2022

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 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/.

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Application of the strain sensor (a) Sensor was applied to human finger for 24 h, stretching tests were performed at the start and end of the experiment by bending the finger at an angle between 110° to 120°. (b) Sensor was applied to the human hand for muscle motion detection for 24 h while measuring the stretching and compression movement of hand. (c) The resistance fluctuates by pulse rate resulting after a change in breathing.