{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,10]],"date-time":"2026-02-10T20:34:45Z","timestamp":1770755685442,"version":"3.50.0"},"reference-count":29,"publisher":"Springer Science and Business Media LLC","issue":"5","license":[{"start":{"date-parts":[[2025,1,20]],"date-time":"2025-01-20T00:00:00Z","timestamp":1737331200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"},{"start":{"date-parts":[[2025,1,20]],"date-time":"2025-01-20T00:00:00Z","timestamp":1737331200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["Int J Obes"],"published-print":{"date-parts":[[2025,5]]},"abstract":"<jats:title>Abstract<\/jats:title>\n          <jats:sec>\n            <jats:title>Purpose<\/jats:title>\n            <jats:p>This study aimed to investigate the validity and applicability of a non-exercise estimation of cardiorespiratory fitness using resting seismocardiography (SCG eV\u0307O<jats:sub>2<\/jats:sub>peak) in people with overweight and obesity before and after a 14-week lifestyle intervention.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Methods<\/jats:title>\n            <jats:p>The study was carried out at a Folk high school that offers 14-week courses on lifestyle changes where participants live at the school and voluntarily participate in daily lectures and activities. Sixty-seven men and women with age and body mass index between 18 and 70 years and 25\u201350\u2009kg\u00b7m<jats:sup>\u20132<\/jats:sup> were tested at baseline, and 52 had a follow-up test after 14 weeks. Testing included the determination of anthropometric variables, an SCG eV\u0307O<jats:sub>2<\/jats:sub>peak at supine rest, and a gold standard V\u0307O<jats:sub>2<\/jats:sub>peak test on a cycle ergometer until voluntary exhaustion.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Results<\/jats:title>\n            <jats:p>Agreement analysis for V\u0307O<jats:sub>2<\/jats:sub>peak at baseline (<jats:italic>n<\/jats:italic>\u2009=\u200967, SCG eV\u0307O<jats:sub>2<\/jats:sub>peak: 26.9\u2009\u00b1\u20091.9\u2009ml\u00b7min<jats:sup>\u20131<\/jats:sup>\u00b7kg<jats:sup>\u20131<\/jats:sup>, V\u0307O<jats:sub>2<\/jats:sub>peak: 26.6\u2009\u00b1\u20091.6\u2009ml\u00b7min<jats:sup>\u20131<\/jats:sup>\u00b7kg<jats:sup>\u20131<\/jats:sup>, mean\u2009\u00b1\u200995% confidence interval) showed a bias of 0.3\u2009\u00b1\u20091.0\u2009ml\u00b7min<jats:sup>\u20131<\/jats:sup>\u00b7kg<jats:sup>\u20131<\/jats:sup> with 95% limits of agreement (LoA) ranging\u2009\u00b1\u20099.8\u2009ml\u00b7min<jats:sup>\u20131<\/jats:sup>\u00b7kg<jats:sup>\u20131<\/jats:sup>. A Pearson\u2019s correlation of r\u2009=\u20090.78 (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.0001) and a standard error of estimate (SEE) of 5.0\u2009ml\u00b7min<jats:sup>\u20131<\/jats:sup>\u00b7kg<jats:sup>\u20131<\/jats:sup> were found between methods. At follow-up (<jats:italic>n<\/jats:italic>\u2009=\u200952), body mass was reduced by 6.6\u2009\u00b1\u20091.4\u2009kg (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.0001). V\u0307O<jats:sub>2<\/jats:sub>peak increased by 3.3\u2009\u00b1\u20090.9\u2009ml\u00b7min<jats:sup>\u20131<\/jats:sup>\u00b7kg<jats:sup>\u20131<\/jats:sup> and 175\u2009\u00b1\u200978\u2009ml\u00b7min<jats:sup>\u20131<\/jats:sup> and SCG eV\u0307O<jats:sub>2<\/jats:sub>peak by 2.6\u2009\u00b1\u20090.8\u2009ml\u00b7min<jats:sup>\u20131<\/jats:sup>\u00b7kg<jats:sup>\u20131<\/jats:sup> and 93\u2009\u00b1\u200976\u2009ml\u00b7min<jats:sup>\u20131<\/jats:sup> (two-way ANOVA repeated measure: intervention <jats:italic>p<\/jats:italic>\u2009&lt;\u20090.0001, method <jats:italic>p<\/jats:italic>\u2009=\u20090.939 and interaction <jats:italic>p<\/jats:italic>\u2009=\u20090.125, relative V\u0307O<jats:sub>2<\/jats:sub>peak). A Pearson\u2019s correlation of r\u2009=\u20090.37 (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.05) was found between changes in relative V\u0307O<jats:sub>2<\/jats:sub>peak but not for absolute V\u0307O<jats:sub>2<\/jats:sub>peak r\u2009=\u20090.10 (<jats:italic>p<\/jats:italic>\u2009=\u20090.402).<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Conclusions<\/jats:title>\n            <jats:p>The SCG method is accurate for estimating V\u0307O<jats:sub>2<\/jats:sub>peak and appropriate for detecting group changes in both relative and absolute V\u0307O<jats:sub>2<\/jats:sub>peak following a lifestyle intervention in people with overweight and obesity. Furthermore, the method can detect individual changes in V\u0307O<jats:sub>2<\/jats:sub>peak but not independently of body mass changes. Yet, the applicability is still limited by the relatively large variation in LoA and SEE.<\/jats:p>\n          <\/jats:sec>","DOI":"10.1038\/s41366-025-01713-9","type":"journal-article","created":{"date-parts":[[2025,1,20]],"date-time":"2025-01-20T11:52:11Z","timestamp":1737373931000},"page":"864-871","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["V\u0307O2peak estimation in people with overweight and obesity before and after a 14-week lifestyle intervention"],"prefix":"10.1038","volume":"49","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3879-2192","authenticated-orcid":false,"given":"Mikkel Thunestvedt","family":"Hansen","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Karina","family":"Husted","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0009-0008-8957-4698","authenticated-orcid":false,"given":"Johanne Louise","family":"Modvig","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kristine Kj\u00e6r","family":"Lange","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0009-0006-0531-174X","authenticated-orcid":false,"given":"Cecilie Moe","family":"Weinreich","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Cathrine","family":"Tranberg","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3037-9344","authenticated-orcid":false,"given":"Tue","family":"R\u00f8mer","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6112-3563","authenticated-orcid":false,"given":"Arthur","family":"Ingersen","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9970-9535","authenticated-orcid":false,"given":"Flemming","family":"Dela","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9724-5423","authenticated-orcid":false,"given":"J\u00f8rn Wulff","family":"Helge","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2025,1,20]]},"reference":[{"key":"1713_CR1","doi-asserted-by":"publisher","first-page":"e653","DOI":"10.1161\/CIR.0000000000000461","volume":"134","author":"R Ross","year":"2016","unstructured":"Ross R, Blair SN, Arena R, Church TS, Despr\u00e9s JP, Franklin BA, et al. 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