{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,27]],"date-time":"2026-06-27T04:10:15Z","timestamp":1782533415092,"version":"3.54.5"},"reference-count":30,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2022,2,11]],"date-time":"2022-02-11T00:00:00Z","timestamp":1644537600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>The assessment of sit-to-stand (STS) performance is highly relevant, especially in older persons, but testing STS performance in the laboratory does not necessarily reflect STS performance in daily life. Therefore, the aim was to validate a wearable sensor-based measure to be used under unsupervised daily life conditions. Since thigh orientation from horizontal to vertical is characteristic for STS movement, peak angular velocity (PAV) of the thigh was chosen as the outcome variable. A total of 20 younger and older healthy persons and geriatric patients (mean age: 55.5 \u00b1 20.8 years; 55% women) with a wide range of STS performance were instructed to stand up from a chair at their usual pace. STS performance was measured by an activity monitor, force plates, and an opto-electronic system. The association between PAV measured by the thigh-worn activity monitor and PAV measured by the opto-electronic system (gold standard) was r = 0.74. The association between PAV measured by the thigh-worn activity monitor and peak power measured by force plate and opto-electronic system was r = 0.76. The Intra-Class Coefficient (ICC) of agreement between the 2 trials was ICC(A,1) = 0.76. In this sample of persons with a wide range of physical performance, PAV as measured by a thigh-worn acceleration sensor was a valid and reliable measure of STS performance.<\/jats:p>","DOI":"10.3390\/s22041405","type":"journal-article","created":{"date-parts":[[2022,2,13]],"date-time":"2022-02-13T20:34:45Z","timestamp":1644784485000},"page":"1405","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Assessment of Thigh Angular Velocity by an Activity Monitor to Describe Sit-to-Stand Performance"],"prefix":"10.3390","volume":"22","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5987-447X","authenticated-orcid":false,"given":"Jochen","family":"Klenk","sequence":"first","affiliation":[{"name":"Department of Clinical Gerontology, Robert-Bosch-Hospital, 70376 Stuttgart, Germany"},{"name":"Institute of Epidemiology and Medical Biometry, Ulm University, 89081 Ulm, Germany"},{"name":"Study Center Stuttgart, IB University of Health and Social Sciences, 70178 Stuttgart, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alassane","family":"Ba","sequence":"additional","affiliation":[{"name":"Department of Clinical Gerontology, Robert-Bosch-Hospital, 70376 Stuttgart, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9972-904X","authenticated-orcid":false,"given":"Kim S.","family":"Sczuka","sequence":"additional","affiliation":[{"name":"Department of Clinical Gerontology, Robert-Bosch-Hospital, 70376 Stuttgart, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Urban","family":"Daub","sequence":"additional","affiliation":[{"name":"Biomechatronic Systems, Fraunhofer Institute for Manufacturing Engineering and Automation IPA, 70569 Stuttgart, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ulrich","family":"Lindemann","sequence":"additional","affiliation":[{"name":"Department of Clinical Gerontology, Robert-Bosch-Hospital, 70376 Stuttgart, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2022,2,11]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"187.e1","DOI":"10.1016\/j.jamda.2011.06.011","article-title":"Epidemiology of Falls in Residential Aged Care: Analysis of More Than 70,000 Falls from Residents of Bavarian Nursing Homes","volume":"13","author":"Rapp","year":"2012","journal-title":"J. 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