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Such an assessment remains indispensable for authentic health management, facilitating proper tracking of health condition progression and implementation of tailored interventions. This study aimed to develop and evaluate a digital health tool that empowers older adults to independently assess comprehensive physical performance, including balance, mobility, lower\u2010limb strength, and cardiorespiratory endurance.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Participants and Setting<\/jats:title>\n                    <jats:p>This was a cross\u2010sectional study employing a user\u2010centered design approach conducted at Samsung Medical Center. Thirty community\u2010dwelling older adults aged \u2265\u200965\u2009years were included.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>A self\u2010administered mobile application with a wearable sensor guided older adults to evaluate and understand their functional performance components. Usability was evaluated using a System Usability Scale (SUS), user experience questionnaires, and open\u2010ended feedback. Preliminary validity was assessed by comparing professional assessments with self\u2010assessments of physical performance.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      The tool achieved acceptable usability (mean SUS 69.0\u2009\u00b1\u200914.84), with most participants (&gt;\u200995%) perceiving the tool to be necessary and useful for health management, and 86.2% confirming home feasibility. Participants valued their understanding of functional capacity, increased motivation for health management, and enhanced willingness to engage in physical activity. Self\u2010assessments of cardiorespiratory endurance and balance showed moderate concordance with professional measurements (\n                      <jats:italic>r<\/jats:italic>\n                      \u2009=\u20090.5\u20130.6) with no significant mean differences.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>The tool provides self\u2010directed, comprehensive assessments and delivers intuitive comparative data against age\u2010 and sex\u2010matched norms, thereby enabling autonomous health management. Despite variable user experience, the tool demonstrated acceptable usability, with most participants recognizing its utility and perceiving the potential for home use. Further refinements in usability, accuracy, and technical simplification are needed. With these improvements, the tool could harness these assessment results to deliver tailored exercise programs and evolve into a comprehensive prevention and rehabilitation resource for older adults.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1111\/jgs.70263","type":"journal-article","created":{"date-parts":[[2026,2,6]],"date-time":"2026-02-06T07:51:12Z","timestamp":1770364272000},"page":"648-657","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Digital Self\u2010Assessment of Physical Performance to Promote Independence in Older Adults: Development, Usability, and Validity"],"prefix":"10.1111","volume":"74","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8449-7637","authenticated-orcid":false,"given":"Ji Young","family":"Lim","sequence":"first","affiliation":[{"name":"Department of Physical and Rehabilitation Medicine Sungkyunkwan University School of Medicine  Seoul Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Heeju","family":"Yu","sequence":"additional","affiliation":[{"name":"Department of Physical Therapy, Graduate School Sahmyook University  Seoul Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yeah Eun","family":"Kwon","sequence":"additional","affiliation":[{"name":"Research Institute for Future Medicine, Samsung Medical Center  Seoul Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jong Geol","family":"Do","sequence":"additional","affiliation":[{"name":"Department of Physical and Rehabilitation Medicine Samsung Medical Center, Sungkyunkwan University School of Medicine  Seoul Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ji Hye","family":"Hwang","sequence":"additional","affiliation":[{"name":"Department of Physical and Rehabilitation Medicine Samsung Medical Center, Sungkyunkwan University School of Medicine  Seoul Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2026,2,5]]},"reference":[{"key":"e_1_2_10_2_1","volume-title":"Integrated Care for Older People (ICOPE): Handbook: Guidance for Person\u2010Centred Assessment and Pathways in Primary Care","author":"Cesari M.","year":"2019"},{"key":"e_1_2_10_3_1","volume-title":"Decade of Healthy Ageing: Baseline Report","author":"World Health Organization","year":"2021"},{"key":"e_1_2_10_4_1","doi-asserted-by":"publisher","DOI":"10.1002\/jcsm.12502"},{"key":"e_1_2_10_5_1","doi-asserted-by":"publisher","DOI":"10.1007\/s11556-014-0144-1"},{"key":"e_1_2_10_6_1","doi-asserted-by":"publisher","DOI":"10.14283\/jfa.2020.61"},{"key":"e_1_2_10_7_1","doi-asserted-by":"publisher","DOI":"10.7326\/M17-0496"},{"key":"e_1_2_10_8_1","doi-asserted-by":"publisher","DOI":"10.1046\/j.1532-5415.2003.51104.x"},{"key":"e_1_2_10_9_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1532-5415.2008.02126.x"},{"key":"e_1_2_10_10_1","doi-asserted-by":"publisher","DOI":"10.1007\/s12603-009-0246-z"},{"key":"e_1_2_10_11_1","doi-asserted-by":"publisher","DOI":"10.1097\/MD.0000000000015984"},{"key":"e_1_2_10_12_1","volume-title":"ACSM's Guidelines for Exercise Testing and Prescription","author":"Medicine ACoS","year":"2013"},{"key":"e_1_2_10_13_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00223-019-00545-w"},{"key":"e_1_2_10_14_1","doi-asserted-by":"publisher","DOI":"10.1016\/S1073-4449(99)70028-2"},{"key":"e_1_2_10_15_1","unstructured":"Ministry of Culture SaT \u201cNational Sports for All Survey [2023\ub144 \uad6d\ubbfc\uc0dd\ud65c\uccb4\uc721\uc870\uc0ac]. 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