{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,23]],"date-time":"2026-08-23T04:22:24Z","timestamp":1787458944572,"version":"build-2736575974"},"reference-count":39,"publisher":"MDPI AG","issue":"8","license":[{"start":{"date-parts":[[2026,8,21]],"date-time":"2026-08-21T00:00:00Z","timestamp":1787270400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100003052","name":"Ministry of Trade, Industry, and Energy","doi-asserted-by":"crossref","id":[{"id":"10.13039\/501100003052","id-type":"DOI","asserted-by":"crossref"}]},{"DOI":"10.13039\/501100003661","name":"Korea Institute for Advancement of Technology (KIAT), Republic of Korea","doi-asserted-by":"publisher","award":["P147700006"],"award-info":[{"award-number":["P147700006"]}],"id":[{"id":"10.13039\/501100003661","id-type":"DOI","asserted-by":"publisher"}]},{"award":["P147700006"],"award-info":[{"award-number":["P147700006"]}],"id":[{"id":"https:\/\/ror.org\/015w1qa96","id-type":"ROR","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Bioengineering"],"abstract":"<jats:p>Individuals with transtibial amputation have impaired postural control due to limited ankle function. Conventional energy-storing-and-return (ESAR) prosthetic feet mainly support sagittal-plane mechanics and provide limited frontal-plane adaptability. This pilot pre\u2013post motion analysis study examined the effects of the Intersection Foot\u00ae (IF), a torsion-adaptive ESAR prosthetic foot, on balance control in 10 male individuals with unilateral transtibial amputation. Three-dimensional motion analysis and force plate measurements were performed during five Berg Balance Scale-derived tasks. During sit-to-stand, IF reduced the mediolateral root mean square distance of center of pressure from 10.20 \u00b1 3.59 to 8.29 \u00b1 3.32 mm (p = 0.047) and the anteroposterior center of mass (CoM) range from 345.51 \u00b1 31.72 to 326.45 \u00b1 47.40 mm (p = 0.008). During tandem stance, IF increased mediolateral CoM range from 23.94 \u00b1 18.77 to 55.99 \u00b1 30.90 mm (p = 0.021), vertical CoM range from 4.14 \u00b1 4.18 to 9.45 \u00b1 7.72 mm (p = 0.038), and sound-side frontal-plane ankle ROM from 1.44 \u00b1 1.20\u00b0 to 2.48 \u00b1 1.30\u00b0 (p = 0.022). Overall, replacing the habitual feet with IF produced task-dependent biomechanical adaptations rather than uniform improvements in postural stability, suggesting reduced dynamic sway during sit-to-stand but increased whole-body and sound-limb compensatory motion during tandem stance.<\/jats:p>","DOI":"10.3390\/bioengineering13080949","type":"journal-article","created":{"date-parts":[[2026,8,21]],"date-time":"2026-08-21T09:31:59Z","timestamp":1787304719000},"page":"949","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Effects of a Torsion-Adaptive Energy-Storing-and-Return Prosthetic Foot on Balance Control in Individuals with Transtibial Amputation: A Pilot Pre\u2013Post Motion Analysis Study"],"prefix":"10.3390","volume":"13","author":[{"given":"Ho-Yong","family":"Jeong","sequence":"first","affiliation":[{"name":"Department of Physical Medicine and Rehabilitation, Veterans Health Service Medical Center, Seoul 05368, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2492-7065","authenticated-orcid":false,"given":"Hee Seung","family":"Yang","sequence":"additional","affiliation":[{"name":"Department of Physical Medicine and Rehabilitation, Veterans Health Service Medical Center, Seoul 05368, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yea-Eun","family":"Lee","sequence":"additional","affiliation":[{"name":"Department of Physical Medicine and Rehabilitation, Veterans Health Service Medical Center, Seoul 05368, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2778-8152","authenticated-orcid":false,"given":"Pyoung-hwa","family":"Choi","sequence":"additional","affiliation":[{"name":"Veterans Health Service Medical Center, Center of Prosthetics and Orthotics, Seoul 05368, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chan-hyeok","family":"Jeong","sequence":"additional","affiliation":[{"name":"Department of Physical Education, Graduate School, Korea National Sport University, Seoul 05541, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hui-Woo","family":"Choi","sequence":"additional","affiliation":[{"name":"Department of Rehabilitation Medical Technology, Korea Nazarene University, Cheonan 31172, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0178-0187","authenticated-orcid":false,"given":"Young","family":"Lee","sequence":"additional","affiliation":[{"name":"Veterans Medical Research Institute, Veterans Health Service Medical Center, Seoul 05368, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,8,21]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"104","DOI":"10.1016\/j.gaitpost.2022.10.018","article-title":"Clinical measures of balance and gait cannot differentiate somatosensory impairments in people with lower-limb amputation","volume":"99","author":"Petersen","year":"2023","journal-title":"Gait Posture"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"134","DOI":"10.1097\/PXR.0000000000000086","article-title":"Balance control deficits in individuals with a transtibial amputation with and without visual input","volume":"46","author":"Moisan","year":"2022","journal-title":"Prosthet. 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