{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,13]],"date-time":"2026-08-13T23:00:18Z","timestamp":1786662018403,"version":"build-2736575974"},"reference-count":38,"publisher":"MDPI AG","issue":"8","license":[{"start":{"date-parts":[[2025,4,18]],"date-time":"2025-04-18T00:00:00Z","timestamp":1744934400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"European Union\u2019s Horizon 2020 research and innovation program","award":["101034252"],"award-info":[{"award-number":["101034252"]}]},{"name":"European Union\u2019s Horizon 2020 research and innovation program","award":["820820"],"award-info":[{"award-number":["820820"]}]},{"name":"Taighde \u00c9ireann\u2014Research Ireland","award":["101034252"],"award-info":[{"award-number":["101034252"]}]},{"name":"Taighde \u00c9ireann\u2014Research Ireland","award":["820820"],"award-info":[{"award-number":["820820"]}]},{"DOI":"10.13039\/501100010767","name":"Innovative Medicines Initiative 2 Joint Undertaking","doi-asserted-by":"publisher","award":["101034252"],"award-info":[{"award-number":["101034252"]}],"id":[{"id":"10.13039\/501100010767","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100010767","name":"Innovative Medicines Initiative 2 Joint Undertaking","doi-asserted-by":"publisher","award":["820820"],"award-info":[{"award-number":["820820"]}],"id":[{"id":"10.13039\/501100010767","id-type":"DOI","asserted-by":"publisher"}]},{"name":"European Union\u2019s Horizon 2020 research and innovation program","award":["101034252"],"award-info":[{"award-number":["101034252"]}]},{"name":"European Union\u2019s Horizon 2020 research and innovation program","award":["820820"],"award-info":[{"award-number":["820820"]}]},{"name":"EFPIA","award":["101034252"],"award-info":[{"award-number":["101034252"]}]},{"name":"EFPIA","award":["820820"],"award-info":[{"award-number":["820820"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Wearable and lightweight devices facilitate real-world physical activity (PA) assessments. MX metrics, as a cut-point-free parameter, evaluate acceleration above which the most active X minutes are accumulated. It provides insights into the intensity of PA over specific durations. This study evaluated the association of MX metrics and clinical tests in older adults recovering from proximal femoral fracture (PFF). Analyses were conducted on the PFF cohort from the baseline assessment of the Mobilise-D project using an accelerometer-based device. Participants (N = 396) were categorized into four recovery groups: acute, post-acute, extended recovery, and long-term recovery. Mobility capacity was assessed through the 6 min walking test (6MinWT), Short Physical Performance Battery (SPPB), 4-m walking test (4MWT), and hand grip (HG) strength. Mobility perception was evaluated using the Late-Life Function and Disability Instrument (LLFDI). Eight MX metrics (M1\u2013M90) were calculated using the GGIR package in R. Results showed a moderate to strong positive correlation between M1 and M30 and lower limb mobility capacity tests and mobility perception (Lower Extremity domains) particularly in the extended and long-term recovery groups. MX metrics can be used for measuring PA intensity among older adults recovering from PFF. Hence, MX metrics have a high potential for clinical use as personalized PA targets in PFF rehabilitation.<\/jats:p>","DOI":"10.3390\/s25082557","type":"journal-article","created":{"date-parts":[[2025,4,18]],"date-time":"2025-04-18T02:25:31Z","timestamp":1744943131000},"page":"2557","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Association of Cut-Point Free Metrics and Common Clinical Tests Among Older Adults After Proximal Femoral Fracture"],"prefix":"10.3390","volume":"25","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7695-2417","authenticated-orcid":false,"given":"Hananeh","family":"Younesian","sequence":"first","affiliation":[{"name":"School of Public Health, Physiotherapy & Population Science, University College Dublin, D04 V1W8 Dublin, Ireland"},{"name":"Insight Research Ireland Centre For Data Analytics, University College Dublin, D04 P7W1 Dublin, 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08003 Barcelona, Spain"},{"name":"Departament de Medicina i Ci\u00e8ncies de la Salut (MELIS), Universitat Pompeu Fabra (UPF), 08003 Barcelona, Spain"},{"name":"CIBER Epidemiolog\u00eda y Salud P\u00fablica (CIBERESP), 28029 Madrid, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lynn","family":"Rochester","sequence":"additional","affiliation":[{"name":"Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne NE4 5PL, UK"},{"name":"National Institute for Health and Care Research (NIHR), Newcastle Biomedical Research Centre (BRC), Newcastle University and the Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne NE4 5PL, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8741-0739","authenticated-orcid":false,"given":"Martin","family":"Aursand Berge","sequence":"additional","affiliation":[{"name":"Department of Neuromedicine and Movement Science, Norwegian University 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Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sarah","family":"Koch","sequence":"additional","affiliation":[{"name":"Barcelona Institute for Global Health (ISGlobal), 08003 Barcelona, Spain"},{"name":"Departament de Medicina i Ci\u00e8ncies de la Salut (MELIS), Universitat Pompeu Fabra (UPF), 08003 Barcelona, Spain"},{"name":"CIBER Epidemiolog\u00eda y Salud P\u00fablica (CIBERESP), 28029 Madrid, Spain"},{"name":"Department for Sport, Exercise, and Health, University of Basel, 4052 Basel, Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0214-9290","authenticated-orcid":false,"given":"Jorunn L.","family":"Helbostad","sequence":"additional","affiliation":[{"name":"Department of Neuromedicine and Movement Science, Norwegian University of Science and Technology, 7030 Trondheim, 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