{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,28]],"date-time":"2026-04-28T08:08:22Z","timestamp":1777363702581,"version":"3.51.4"},"reference-count":69,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2024,5,6]],"date-time":"2024-05-06T00:00:00Z","timestamp":1714953600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Bio and Medical Technology Development Programs of the National Research Foundation (NRF)","award":["2016M3A9F1941984"],"award-info":[{"award-number":["2016M3A9F1941984"]}]},{"name":"Bio and Medical Technology Development Programs of the National Research Foundation (NRF)","award":["HC21C0064"],"award-info":[{"award-number":["HC21C0064"]}]},{"DOI":"10.13039\/501100003725","name":"Ministry of Science and ICT, Republic of Korea","doi-asserted-by":"publisher","award":["2016M3A9F1941984"],"award-info":[{"award-number":["2016M3A9F1941984"]}],"id":[{"id":"10.13039\/501100003725","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100003725","name":"Ministry of Science and ICT, Republic of Korea","doi-asserted-by":"publisher","award":["HC21C0064"],"award-info":[{"award-number":["HC21C0064"]}],"id":[{"id":"10.13039\/501100003725","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Patient-Centered Clinical Research Coordinating Center (PACEN)","award":["2016M3A9F1941984"],"award-info":[{"award-number":["2016M3A9F1941984"]}]},{"name":"Patient-Centered Clinical Research Coordinating Center (PACEN)","award":["HC21C0064"],"award-info":[{"award-number":["HC21C0064"]}]},{"name":"Ministry of Health &amp; Welfare, Republic of Korea","award":["2016M3A9F1941984"],"award-info":[{"award-number":["2016M3A9F1941984"]}]},{"name":"Ministry of Health &amp; Welfare, Republic of Korea","award":["HC21C0064"],"award-info":[{"award-number":["HC21C0064"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JCM"],"abstract":"<jats:p>Background\/Objectives: Lumbar lordotic curvature (LLC), closely associated with low back pain (LBP) when decreased, is infrequently assessed in clinical settings due to the spatiotemporal limitations of radiographic methods. To overcome these constraints, this study used an inertial measurement system to compare the magnitude and maintenance of LLC across various sitting conditions, categorized into three aspects: verbal instructions, chair type, and desk task types. Methods: Twenty-nine healthy participants were instructed to sit for 3 min with two wireless sensors placed on the 12th thoracic vertebra and the 2nd sacral vertebra. The lumbar lordotic angle (LLA) was measured using relative angles for the mediolateral axis and comparisons were made within each sitting category. Results: The maintenance of LLA (LLAdev) was significantly smaller when participants were instructed to sit upright (\u22123.7 \u00b1 3.9\u00b0) compared to that of their habitual sitting posture (\u22121.2 \u00b1 2.4\u00b0) (p = 0.001), while the magnitude of LLA (LLAavg) was significantly larger with an upright sitting posture (p = 0.001). LLAdev was significantly larger when using an office chair (\u22120.4 \u00b1 1.1\u00b0) than when using a stool (\u22123.2 \u00b1 7.1\u00b0) (p = 0.033), and LLAavg was also significantly larger with the office chair (p &lt; 0.001). Among the desk tasks, LLAavg was largest during keyboard tasks (p &lt; 0.001), followed by mouse and writing tasks; LLAdev showed a similar trend without statistical significance (keyboard, \u22121.2 \u00b1 3.0\u00b0; mouse, \u22121.8 \u00b1 2.2\u00b0; writing, \u22122.9 \u00b1 3.1\u00b0) (p = 0.067). Conclusions: Our findings suggest that strategies including the use of an office chair and preference for computer work may help preserve LLC, whereas in the case of cueing, repetition may be necessary.<\/jats:p>","DOI":"10.3390\/jcm13092728","type":"journal-article","created":{"date-parts":[[2024,5,6]],"date-time":"2024-05-06T14:26:11Z","timestamp":1715005571000},"page":"2728","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Assessing the Preservation of Lumbar Lordotic Curvature in Everyday Sitting Conditions Assessed with an Inertial Measurement System"],"prefix":"10.3390","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4015-6096","authenticated-orcid":false,"given":"Ju Chan","family":"Kim","sequence":"first","affiliation":[{"name":"Department of Rehabilitation Medicine, National Traffic Injury Rehabilitation Hospital, Yangpyeong 12564, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jeong-Gil","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Rehabilitation Medicine, Armed Forces Yangju Hospital, Yangju 11429, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Beom Suk","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Physical and Rehabilitation Medicine, Chung-Ang University Gwangmyeong Hospital, Gwangmyeong 14353, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Cheol Ki","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Rehabilitation Medicine, Seoul National University Hospital, Seoul 03080, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Minseok","family":"Choi","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, Seoul National University Hospital, Seoul 03080, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Joonnyong","family":"Lee","sequence":"additional","affiliation":[{"name":"Mellowing Factory Co., Ltd., Seoul 06053, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5785-8110","authenticated-orcid":false,"given":"Sun Gun","family":"Chung","sequence":"additional","affiliation":[{"name":"Department of Rehabilitation Medicine, Seoul National University College of Medicine, Seoul 03080, Republic of Korea"},{"name":"Institute of Aging, Medical Research Center, Seoul National University, Seoul 03080, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2024,5,6]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"15","DOI":"10.1002\/evan.21437","article-title":"Evolution of the hominoid vertebral column: The long and the short of it","volume":"24","author":"Williams","year":"2015","journal-title":"Evol. 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