{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,7]],"date-time":"2026-04-07T13:02:07Z","timestamp":1775566927063,"version":"3.50.1"},"reference-count":33,"publisher":"MDPI AG","issue":"22","license":[{"start":{"date-parts":[[2021,11,13]],"date-time":"2021-11-13T00:00:00Z","timestamp":1636761600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001691","name":"Japan Society for the Promotion of Science","doi-asserted-by":"publisher","award":["20J10461"],"award-info":[{"award-number":["20J10461"]}],"id":[{"id":"10.13039\/501100001691","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>In Japan, the aging population is expected to increase the number of elderly people in the future. The purpose of this study was to develop a hip lift transfer assistive system to improve the QOL of elderly living and to prevent back pain for caregivers. We extracted the impediment factor and the necessary scene for the assistance, decided on the transfer process from the wheelchair in the toilet, and considered the reduction method of the burden based on the quantitative evaluation of the caregiver\u2019s lumbar burden and developed the device. Then we proposed the algorithm of the system by grasping the behavior and lumbar burden characteristics at the time of using the hip lift transfer assistive system by the developed device in which the proposed support algorithm of standing seating assistance operation is implemented in the actual use environment. Through the assistive movement evaluation experiment and the actual operation in the toilet, we have verified that the use of this device can reduce the caregivers\u2019 lumbar burden below the standard value (3400 N) and have proved the effectiveness of the proposed transfer assistive system.<\/jats:p>","DOI":"10.3390\/s21227548","type":"journal-article","created":{"date-parts":[[2021,11,14]],"date-time":"2021-11-14T20:51:53Z","timestamp":1636923113000},"page":"7548","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Hip Lift Transfer Assistive System for Reducing Burden on Caregiver\u2019s Waist"],"prefix":"10.3390","volume":"21","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4982-927X","authenticated-orcid":false,"given":"Jiang","family":"Wu","sequence":"first","affiliation":[{"name":"Department of Human and Engineered Environmental Studies, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8563, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Motoki","family":"Shino","sequence":"additional","affiliation":[{"name":"Department of Human and Engineered Environmental Studies, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8563, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2021,11,13]]},"reference":[{"key":"ref_1","unstructured":"(2021, February 22). Reiwa 1st Edition White Paper on Aging Society (Whole Version). Available online: https:\/\/www8.cao.go.jp\/kourei\/whitepaper\/w-2019\/zenbun\/01pdf_index.html."},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Yang, Y., Zheng, R., and Zhao, L. (2021). Population aging, health investment and economic growth: Based on a cross-country panel data analysis. Int. J. Environ. Res. Public Health, 18.","DOI":"10.3390\/ijerph18041801"},{"key":"ref_3","unstructured":"Mehrdad, R., Shams-Hosseini, N.S., Aghdaei, S., and Yousefian, M. (2016). Prevalence of low back pain in health care workers and comparison with other occupational categories in Iran: A systematic review. Iran. J. Med. Sci., 41."},{"key":"ref_4","doi-asserted-by":"crossref","unstructured":"Rasmussen, C.D., Holtermann, A., Mortensen, O.S., S\u00f8gaard, K., and J\u00f8rgensen, M.B. (2013). Prevention of low back pain and its consequences among nurses\u2019 aides in elderly care: A stepped-wedge multi-faceted cluster-randomized controlled trial. BMC Public Health, 13.","DOI":"10.1186\/1471-2458-13-1088"},{"key":"ref_5","first-page":"709","article-title":"Work related movement disorders of nurses\u2014Basic of prevention and Countermeasures (special collection of human care services and ergonomics)","volume":"59","author":"Kurumatani","year":"2004","journal-title":"J. Labor Sci."},{"key":"ref_6","unstructured":"(2021, February 22). Study Group Report on Revision and Spread of Low Back Pain Prevention Measures Guidelines in the Workplace. Ministry of Health, Labor and Welfare. Available online: https:\/\/www.mhlw.go.jp\/stf\/shingi\/2r98520000034qqlatt\/2r98520000034qs-0.pdf."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"197","DOI":"10.1620\/tjem.247.197","article-title":"Family Caregivers\u2019 Perspectives for the Effect of Social Support on their Care Burden and Quality of Life: A Mixed-Method Study in Rural and Sub-Urban Central Japan","volume":"247","author":"Haya","year":"2019","journal-title":"Tohoku J. Exp. Med."},{"key":"ref_8","unstructured":"(2021, September 02). Yoshikawa Kiyoshi, Basic Knowledge of Selection and Utilization of Lift and other Moving Supplies. Available online: https:\/\/hcr.or.jp\/cms\/wp-content\/uploads\/howto_2020_1_2.pdf."},{"key":"ref_9","first-page":"294","article-title":"Low Back Load of Caregiver During Transfer Movement Using Assistive Devices","volume":"34","author":"Sasaki","year":"2007","journal-title":"Phys. Ther."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"227","DOI":"10.1299\/kikaic.76.227","article-title":"Transferring-care assistance with robot suit HAL","volume":"76","author":"Satoh","year":"2010","journal-title":"Trans. Jpn. Soc. Mech. Eng. Ser. C"},{"key":"ref_11","first-page":"2987","article-title":"Development and Quantitative Performance Estimation of the Back Support Muscle Suit","volume":"78","author":"Sato","year":"2012","journal-title":"Jpn. Soc. Mech. Eng. Proc. C"},{"key":"ref_12","unstructured":"Keiroka, Y.I. (2014). Device Smart Suit Lite with Trunk Stabilizing Effect and Muscle Assistive Effect. [Ph.D. Thesis, Hokkaido University]."},{"key":"ref_13","doi-asserted-by":"crossref","unstructured":"Sankai, Y. (2010). HAL: Hybrid assistive limb based on cybernics. Robotics Research, Springer.","DOI":"10.1007\/978-3-642-14743-2_3"},{"key":"ref_14","unstructured":"(2021, February 22). Ai Ijo-Kun Mobile Assistance Robot, Art Plan Co., Ltd. Available online: http:\/\/www.artplan.ne.jp\/fukusikiki-syouhinsetumei.html."},{"key":"ref_15","unstructured":"(2021, September 02). Transfer Care Assist, Toyota Motor Corporation. Available online: https:\/\/global.toyota\/jp\/download\/2829198\/."},{"key":"ref_16","unstructured":"(2021, September 02). Komawarisan-J, Hearts-Eiko. Available online: https:\/\/www.scrio.co.jp\/fs\/kaigo\/2240."},{"key":"ref_17","unstructured":"(2021, September 02). Skylift, I-Sonex. Available online: https:\/\/www.scrio.co.jp\/fs\/kaigo\/4775."},{"key":"ref_18","unstructured":"(2021, September 02). Molift Quick Raiser 1, Molift. Available online: https:\/\/www.etac.com\/products\/patient-handling\/hoists\/molift-quick-raiser-1\/."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"49","DOI":"10.1539\/sangyoeisei.48.49","article-title":"Equipment at the special nursing homes for the elderly: A workplace survey of new nursing homes in Osaka Prefecture","volume":"48","author":"Tomioka","year":"2006","journal-title":"Sangyo Eiseigaku Zasshi = J. Occup. Health"},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"270","DOI":"10.1080\/17483107.2019.1673833","article-title":"Person transfer assist systems: A literature review","volume":"16","author":"Sivakanthan","year":"2021","journal-title":"Disabil. Rehabil. Assist. Technol."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"59","DOI":"10.1108\/JET-12-2016-0025","article-title":"Design and development of a robotic self-transfer device for wheelchair users","volume":"11","author":"Krishnan","year":"2017","journal-title":"J. Enabling Technol."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"206","DOI":"10.1016\/j.jelekin.2012.08.016","article-title":"Subject-specific, whole-body models of the stooped posture with a personal weight transfer device","volume":"23","author":"Ulrey","year":"2013","journal-title":"J. Electromyogr. Kinesiol."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"885","DOI":"10.1097\/PHM.0000000000001665","article-title":"Assessment of Muscle Activation of Caregivers Performing Dependent Transfers with a Novel Robotic-Assisted Transfer Device Compared with the Hoyer Advance","volume":"100","author":"Blaauw","year":"2021","journal-title":"Am. J. Phys. Med. Rehabil."},{"key":"ref_24","unstructured":"(2021, September 02). Elderly Care Fact-Finding Results, Ministry of Health, Labor and Welfare. Available online: https:\/\/www.mhlw.go.jp\/shing-i\/2007\/11\/dl\/s1109-10.html."},{"key":"ref_25","first-page":"72","article-title":"Study of Knowledge Supporting Basic Nursing Arts (2): Philological Research on Elimination","volume":"11","author":"Hattori","year":"2000","journal-title":"J. Juntendo Med. Coll. Nurs."},{"key":"ref_26","unstructured":"(2021, February 22). Ministry of Land, Infrastructure, Transport and Tourism: Architectural Design Standard that Considers the Smooth Movement of the Elderly and Disabled. Available online: https:\/\/www.mlit.go.jp\/jutakukentiku\/build\/barrier-free.files\/guideline12.pdf."},{"key":"ref_27","unstructured":"(2021, February 22). JIST9201: 2016 Manual Wheelchair. Available online: https:\/\/kikakurui.com\/t9\/T9201-2016-01.html."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"195","DOI":"10.3951\/biomechanisms.16.195","article-title":"Measurement of transferring motions and evaluation of caregiver\u2019s lower-back load","volume":"16","author":"Yamazaki","year":"2002","journal-title":"Biomechanisms"},{"key":"ref_29","unstructured":"NIOSH, National Institute for Occupational Safe and Health (1981). Work Practices Guide for Manual Lifting, Dept. Health and Human Services. No. 81-122."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"125","DOI":"10.3951\/biomechanisms.13.125","article-title":"Body segment inertia properties of Japanese elderly","volume":"13","author":"Okada","year":"1996","journal-title":"Biomechanisms"},{"key":"ref_31","unstructured":"(2021, February 22). AIST Human Body Dimension Database 1991\u20131992. Available online: https:\/\/www.airc.aist.go.jp\/dhrt\/91-92\/."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"383","DOI":"10.1002\/jor.1100080310","article-title":"Measurement of lower extremity kinematics during level walking","volume":"8","author":"Kadaba","year":"1990","journal-title":"J. Orthop. Res."},{"key":"ref_33","doi-asserted-by":"crossref","unstructured":"Wu, J., and Shino, M. (2018, January 12\u201315). Development of Transfer Assist Equipment by Lower Back Burden Reduction Method of Caregiver. Proceedings of the 2018 IEEE International Conference on Robotics and Biomimetics (ROBIO), Kuala Lumpur, Malaysia.","DOI":"10.1109\/ROBIO.2018.8665301"}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/21\/22\/7548\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T07:29:41Z","timestamp":1760167781000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/21\/22\/7548"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,11,13]]},"references-count":33,"journal-issue":{"issue":"22","published-online":{"date-parts":[[2021,11]]}},"alternative-id":["s21227548"],"URL":"https:\/\/doi.org\/10.3390\/s21227548","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2021,11,13]]}}}