{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,15]],"date-time":"2026-10-15T15:00:09Z","timestamp":1792076409461,"version":"4.4.0"},"reference-count":35,"publisher":"MDPI AG","issue":"18","license":[{"start":{"date-parts":[[2022,9,13]],"date-time":"2022-09-13T00:00:00Z","timestamp":1663027200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100012166","name":"National Key Research and Development Program","doi-asserted-by":"publisher","award":["2017YFD0601104"],"award-info":[{"award-number":["2017YFD0601104"]}],"id":[{"id":"10.13039\/501100012166","id-type":"DOI","asserted-by":"publisher"}]},{"name":"2020 Jiangsu Postgraduate \u201cInternational Smart Health Furniture Design and Engineering\u201d project","award":["2017YFD0601104"],"award-info":[{"award-number":["2017YFD0601104"]}]},{"name":"Nanjing Forestry University Ecological Health Home Furnishing Industry-University-Research International Cooperation Joint Support for laboratory projects","award":["2017YFD0601104"],"award-info":[{"award-number":["2017YFD0601104"]}]},{"name":"Qing Lan Project","award":["2017YFD0601104"],"award-info":[{"award-number":["2017YFD0601104"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJERPH"],"abstract":"<jats:p>The aging population has a higher level of consumption willingness, higher quality of life demands, and more diversified spiritual pursuits. In recent years, age-friendly industries have entered a \u2018blue ocean of development\u2019; intelligent recreation and age-friendly industries have become new growth points in the double-cycle situation; however, the current generalized design of the market is not enough to meet the needs of its elderly users. Through an extensive research and demand analysis focused on the highly-frequent use of sofas by elderly individuals, an AHP analysis showed that smart sofa design guidelines are among the most important functional indicators; user \u2018pain points\u2019 focused on low seat surfaces caused by the difficulty in getting up. To further refine this action behavior, a Kinect-based experimental device was used to capture the behavior of the elderly user during the sit-to-stand transition. The experimental data were collected from 25 key skeletal points in the human body and further investigated by converting the skeletal points into 12 key joint angles to refine the joint transition threshold risk during the sit-to-stand transition for the elderly user. The test results show that the most important joint angle affecting the sit-to-stand transition process is the trunk thigh angle was \u03b85-2, with an important value of 0.122. The two-dimensional body data of the elderly user was mapped to the joint angles under the three-dimensional activity threshold to build a comfort model of the elderly user\u2019s sofa, providing a theoretical basis for the design parameters of the aging sofa. In response to the research results, an intelligent age-friendly sofa with three forms was designed and prototyped independently, meeting the universal size of elderly users in terms of dimensional parameters, and iterating leisure and assisted standing transformation in terms of function (to reduce the risk levels of the sitting and standing transformations of elderly users).<\/jats:p>","DOI":"10.3390\/ijerph191811522","type":"journal-article","created":{"date-parts":[[2022,9,13]],"date-time":"2022-09-13T21:06:52Z","timestamp":1663103212000},"page":"11522","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Recognition and Analysis of an Age-Friendly Intelligent Sofa Design Based on Skeletal Key-Points"],"prefix":"10.3390","volume":"19","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4988-5896","authenticated-orcid":false,"given":"Chengmin","family":"Zhou","sequence":"first","affiliation":[{"name":"College of Furnishings and Industrial Design, Nanjing Forestry University, Nanjing 210037, China"},{"name":"Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing 210037, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9771-8147","authenticated-orcid":false,"given":"Ting","family":"Huang","sequence":"additional","affiliation":[{"name":"College of Furnishings and Industrial Design, Nanjing Forestry University, Nanjing 210037, China"},{"name":"Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing 210037, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xin","family":"Luo","sequence":"additional","affiliation":[{"name":"College of Furnishings and Industrial Design, Nanjing Forestry University, Nanjing 210037, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7946-7433","authenticated-orcid":false,"given":"Jake","family":"Kaner","sequence":"additional","affiliation":[{"name":"School of Art and Design, Nottingham Trent University, Nottingham NG1 4FQ, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiaoman","family":"Fu","sequence":"additional","affiliation":[{"name":"College of Art and Design, Nanjing Audit University Jinshen College, Nanjing 210023, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2022,9,13]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"849","DOI":"10.1080\/00343404.2018.1492110","article-title":"Difference analysis of regional population ageing from temporal and spatial perspectives: A case study in China","volume":"53","author":"Chen","year":"2019","journal-title":"Reg. 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