{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,25]],"date-time":"2026-04-25T03:17:44Z","timestamp":1777087064030,"version":"3.51.4"},"reference-count":31,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2024,12,3]],"date-time":"2024-12-03T00:00:00Z","timestamp":1733184000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"French ministry of sports","award":["19r33"],"award-info":[{"award-number":["19r33"]}]},{"name":"French gymnastics federation","award":["19r33"],"award-info":[{"award-number":["19r33"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JFMK"],"abstract":"<jats:p>Background\/Objectives: The aim of this study was to evaluate changes in trunk height and variations in spino-pelvic parameters during trunk self-elongation. Two populations were studied: non-athletes and gymnasts, who differ in their engagement with core-strengthening exercises. Methods: EOS biplanar radiographs were taken on 14 non-athletes and 24 gymnasts in both neutral and trunk self-elongation positions. Three-dimensional reconstructions of the pelvis and spine were used to calculate effective trunk height, thoracic and lumbar contributions, and spino-pelvic parameters. Results: Trunk self-elongation resulted in a significant increase in trunk height for both groups (7 mm on average, range: \u22121 to 14 mm), accompanied by a reduction in thoracic kyphosis for all participants (\u221210\u00b0 for non-athletes and \u221217\u00b0 for gymnasts, on average) and a reduction in lumbar lordosis in most participants (\u22125\u00b0 for non-athletes and \u22127\u00b0 for gymnasts, on average). However, some individuals in both groups exhibited an increase in lumbar lordosis, which reduced the contribution of the lumbar region to overall trunk height. Conclusions: Trunk self-elongation instruction effectively increases trunk height, but additional instructions, such as pelvic retroversion, may enhance its effectiveness.<\/jats:p>","DOI":"10.3390\/jfmk9040253","type":"journal-article","created":{"date-parts":[[2024,12,3]],"date-time":"2024-12-03T11:48:56Z","timestamp":1733226536000},"page":"253","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Does Trunk Self-Elongation Instruction Lead to Changes in Effective Trunk Height and Spino-Pelvic Parameters? A Radiographic Analysis"],"prefix":"10.3390","volume":"9","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8243-4333","authenticated-orcid":false,"given":"Gr\u00e9goire","family":"Prum","sequence":"first","affiliation":[{"name":"Institut de Biom\u00e9canique Humaine Georges Charpak, Arts et M\u00e9tiers Sciences and Technologies, 75013 Paris, France"},{"name":"Unit\u00e9 de M\u00e9decine Physique et R\u00e9\u00e9ducation, Rouen University Hospital, 76000 Rouen, France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8883-598X","authenticated-orcid":false,"given":"Camille","family":"Eyssartier","sequence":"additional","affiliation":[{"name":"Institut de Biom\u00e9canique Humaine Georges Charpak, Arts et M\u00e9tiers Sciences and Technologies, 75013 Paris, France"},{"name":"French Gymnastics Federation, 75010 Paris, France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0178-4858","authenticated-orcid":false,"given":"Maxime","family":"Bourgain","sequence":"additional","affiliation":[{"name":"Institut de Biom\u00e9canique Humaine Georges Charpak, Arts et M\u00e9tiers Sciences and Technologies, 75013 Paris, France"},{"name":"EPF School of Engineering, 94230 Cachan, France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8827-0547","authenticated-orcid":false,"given":"Philippe","family":"Rouch","sequence":"additional","affiliation":[{"name":"Institut de Biom\u00e9canique Humaine Georges Charpak, Arts et M\u00e9tiers Sciences and Technologies, 75013 Paris, France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Pierre","family":"Billard","sequence":"additional","affiliation":[{"name":"French Gymnastics Federation, 75010 Paris, France"},{"name":"Grand H\u00f4pital de l\u2019Est Francilien, 77100 Meaux, France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3469-4210","authenticated-orcid":false,"given":"Patricia","family":"Thoreux","sequence":"additional","affiliation":[{"name":"Institut de Biom\u00e9canique Humaine Georges Charpak, Universit\u00e9 Sorbonne Paris Nord, 93430 Villetaneuse, France"},{"name":"Centre d\u2019Investigations en M\u00e9decine du Sport, H\u00f4pital H\u00f4tel Dieu, Assistance Publique-H\u00f4pitaux de Paris, 75004 Paris, France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6196-2698","authenticated-orcid":false,"given":"Christophe","family":"Sauret","sequence":"additional","affiliation":[{"name":"Institut de Biom\u00e9canique Humaine Georges Charpak, Arts et M\u00e9tiers Sciences and Technologies, 75013 Paris, France"},{"name":"Center for Research and Studies on Assistive Devices for People with Disabilities (CERAH), Institution Nationale des Invalides, 75007 Paris, France"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2024,12,3]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Dupuis, S., Fortin, C., Caouette, C., Leclair, I., and Aubin, C.-\u00c9. 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