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However, there is a lack of comprehensive reviews and consensus in the field. This work reviews the literature on passively collected data from digital health technology in relation to physical function and capacity tests and informs future investigations in this domain. A systematic literature search was conducted following the PRISMA guidelines on three databases. Our analysis identifies cardiovascular and neurodegenerative diseases as the most frequently studied conditions, and wearables embedding inertial sensors as the most common device type. Most studies rely on 1 week-long data collection. Associations between physical test outcomes and metrics such as step count and activity intensity show correlations as high as 0.89 when machine learning is introduced. This review provides a comprehensive summary of current research on the use of digital health technology in free-living conditions and the clinical significance of data when associated with physical tests.<\/jats:p>","DOI":"10.1145\/3797893","type":"journal-article","created":{"date-parts":[[2026,2,17]],"date-time":"2026-02-17T07:17:02Z","timestamp":1771312622000},"page":"1-37","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":0,"title":["Associating Physical Function and Capacity Tests to Free-Living Sensor Data: A Systematic Review on Technology and Methods"],"prefix":"10.1145","volume":"7","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8461-0089","authenticated-orcid":false,"given":"Sara","family":"Caramaschi","sequence":"first","affiliation":[{"name":"Sustainable Digitalisation Research Centre, Department of Computer Science and Media Technology, Malmo University, Malm\u00f6, Sweden"}]},{"ORCID":"https:\/\/orcid.org\/0009-0009-1120-3683","authenticated-orcid":false,"given":"Dario","family":"Ghezzi","sequence":"additional","affiliation":[{"name":"Information Science and Technologies Institute Alessandro Faedo, National Research Council, Pisa, Italy"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4261-281X","authenticated-orcid":false,"given":"Carl Magnus","family":"Olsson","sequence":"additional","affiliation":[{"name":"Sustainable Digitalisation Research Centre, Department of Computer Science and Media Technology, Malmo University, Malm\u00f6, Sweden"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9778-7142","authenticated-orcid":false,"given":"Filippo","family":"Palumbo","sequence":"additional","affiliation":[{"name":"National Research Council, Institute of Information Science and Technologies Alessandro Faedo, Pisa, Italy"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9203-1124","authenticated-orcid":false,"given":"Dario","family":"Salvi","sequence":"additional","affiliation":[{"name":"Sustainable Digitalisation Research Centre, Department of Computer Science and Media Technology, Malmo University, Malm\u00f6, Sweden"}]}],"member":"320","published-online":{"date-parts":[[2026,4,6]]},"reference":[{"key":"e_1_3_1_2_2","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pmed.1001953"},{"key":"e_1_3_1_3_2","doi-asserted-by":"publisher","DOI":"10.3390\/biomechanics4030037"},{"key":"e_1_3_1_4_2","doi-asserted-by":"publisher","DOI":"10.1111\/j.1532-5415.1991.tb01616.x"},{"issue":"2","key":"e_1_3_1_5_2","doi-asserted-by":"crossref","first-page":"243","DOI":"10.1016\/j.berh.2017.11.008","article-title":"Measuring physical capacity and performance in older people","volume":"31","author":"Lamb Sarah E.","year":"2017","unstructured":"Sarah E. 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