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Nowadays, due to technological progress, smaller and cheaper devices allow the implementation of BIA into wearable devices. In this pilot study, we analyzed the measurement precision of a cheap BIA solution for wearable devices. Intra-session, intra-day, and inter-day reproducibility of raw impedance values from three subjects at three different body locations (hand-to-hand, hand-to-torso, torso-to-torso), and for three different frequencies (6, 54, and 500\u00a0kHz) were analyzed using the coefficient of variation (CV%). Hand-to-hand and hand-to-torso measurements resulted, on average, in high intra-session (CV%\u2009=\u20090.14% and CV%\u2009=\u20090.11%, respectively), intra-day (CV%\u2009=\u20091.67% and CV%\u2009=\u20091.26%, respectively), and inter-day (CV%\u2009=\u20091.53% and CV%\u2009=\u20091.31%) precision. Absolute impedance values for the torso-to-torso measurements showed a larger mean variation (intra-session CV%\u2009=\u20090.68%; intra-day CV%\u2009=\u20095.53%, inter-day CV%\u2009=\u20093.13%). Overall, this cheap BIA solution shows high precision and promising usability for further integration into a wearable measurement environment.<\/jats:p>","DOI":"10.1007\/978-3-031-59091-7_29","type":"book-chapter","created":{"date-parts":[[2024,5,4]],"date-time":"2024-05-04T18:01:59Z","timestamp":1714845719000},"page":"441-450","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Inter- and Intra-Day Precision of a Low-Cost and Wearable Bioelectrical Impedance Analysis Device"],"prefix":"10.1007","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9618-0266","authenticated-orcid":false,"given":"Leon","family":"Robertz","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lassi","family":"Rieppo","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Seppo","family":"Korkala","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tommi","family":"Jaako","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2850-5484","authenticated-orcid":false,"given":"Simo","family":"Saarakkala","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2024,5,5]]},"reference":[{"key":"29_CR1","doi-asserted-by":"publisher","first-page":"187","DOI":"10.1038\/s41430-018-0360-2","volume":"73","author":"KL Price","year":"2019","unstructured":"Price, K.L., Earthman, C.P.: Update on body composition tools in clinical settings: computed tomography, ultrasound, and bioimpedance applications for assessment and monitoring. 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