{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,1]],"date-time":"2026-05-01T21:38:39Z","timestamp":1777671519178,"version":"3.51.4"},"reference-count":38,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2023,2,3]],"date-time":"2023-02-03T00:00:00Z","timestamp":1675382400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Mahidol University Mini-Research Cluster (MU-MINIRC)","award":["R016520005"],"award-info":[{"award-number":["R016520005"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Background: A validity and reliability assessment of inertial measurement unit (IMU)-derived joint angular kinematics during walking is a necessary step for motion analysis in the lower extremity prosthesis user population. This study aimed to assess the accuracy and reliability of an inertial measurement unit (IMU) system compared to an optical motion capture (OMC) system in transtibial prosthesis (TTP) users. Methods: Thirty TTP users were recruited and underwent simultaneous motion capture from IMU and OMC systems during walking. Reliability and validity were assessed using intra- and inter-subject variability with standard deviation (S.D.), average S.D., and intraclass correlation coefficient (ICC). Results: The intra-subject S.D. for all rotations of the lower limb joints were less than 1\u00b0 for both systems. The IMU system had a lower mean S.D. (o), as seen in inter-subject variability. The ICC revealed good to excellent agreement between the two systems for all sagittal kinematic parameters. Conclusion: All joint angular kinematic comparisons supported the IMU system\u2019s results as comparable to OMC. The IMU was capable of precise sagittal plane motion data and demonstrated validity and reliability to OMC. These findings evidence that when compared to OMC, an IMU system may serve well in evaluating the gait of lower limb prosthesis users.<\/jats:p>","DOI":"10.3390\/s23031738","type":"journal-article","created":{"date-parts":[[2023,2,6]],"date-time":"2023-02-06T02:06:43Z","timestamp":1675649203000},"page":"1738","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":24,"title":["Validity and Reliability of Inertial Measurement Unit (IMU)-Derived 3D Joint Kinematics in Persons Wearing Transtibial Prosthesis"],"prefix":"10.3390","volume":"23","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2188-5672","authenticated-orcid":false,"given":"Jutima","family":"Rattanakoch","sequence":"first","affiliation":[{"name":"Sirindhorn School of Prosthetics and Orthotics, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok 10700, Thailand"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6244-7209","authenticated-orcid":false,"given":"Manunchaya","family":"Samala","sequence":"additional","affiliation":[{"name":"Sirindhorn School of Prosthetics and Orthotics, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok 10700, Thailand"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3431-1793","authenticated-orcid":false,"given":"Weerawat","family":"Limroongreungrat","sequence":"additional","affiliation":[{"name":"College of Sports Science and Technology, Mahidol University, Nakhon Pathom 73170, Thailand"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0161-4616","authenticated-orcid":false,"given":"Gary","family":"Guerra","sequence":"additional","affiliation":[{"name":"Exercise and Sport Science Department, St. Mary\u2019s University, San Antonio, TX 78228, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kittichai","family":"Tharawadeepimuk","sequence":"additional","affiliation":[{"name":"College of Sports Science and Technology, Mahidol University, Nakhon Pathom 73170, Thailand"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ampika","family":"Nanbancha","sequence":"additional","affiliation":[{"name":"College of Sports Science and Technology, Mahidol University, Nakhon Pathom 73170, Thailand"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0887-9315","authenticated-orcid":false,"given":"Wisavaporn","family":"Niamsang","sequence":"additional","affiliation":[{"name":"Sirindhorn School of Prosthetics and Orthotics, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok 10700, Thailand"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Pichitpol","family":"Kerdsomnuek","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok 10700, Thailand"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sarit","family":"Suwanmana","sequence":"additional","affiliation":[{"name":"College of Sports Science and Technology, Mahidol University, Nakhon Pathom 73170, Thailand"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2023,2,3]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"480","DOI":"10.1080\/0963828031000090434","article-title":"Health-related quality of life and related factors in 539 persons with amputation of the upper and lower limb","volume":"25","author":"Demet","year":"2003","journal-title":"Disabil. 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