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Here we investigate the possibility that this condition develops prior to growth plate closure, at a time when the epiphyseal cartilage is responsive to torsional loading.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Materials and Methods<\/jats:title>\n                    <jats:p>We analyze the degree of torsion along the tibial shaft and compare that to the cnemic index (a measure of platycnemia) in two populations: ancient Jomon and modern Japanese. Through linear mixed\u2010effects modeling, we aimed to determine whether platycnemia, as measured by the cnemic index, is correlated with the magnitude of torsion that the tibia undergoes during development, prior to growth plate closure.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>Our results show that cnemic index significantly decreases as individuals age and the tibia lengthens, resulting in increasing mediolateral flattening and greater instances of platycnemia. However, we found no significant relationship between tibial torsion and the cnemic index.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Discussion<\/jats:title>\n                    <jats:p>Our findings suggest that a broader range of genetic, biomechanical, and environmental properties needs to be considered when hypothesizing how skeletal modeling might be related to the development of platycnemia.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/ajpa.70336","type":"journal-article","created":{"date-parts":[[2026,8,5]],"date-time":"2026-08-05T14:30:21Z","timestamp":1785940221000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Does Platycnemia Develop in Squatting Populations as a Response to Torsional Rotation Across the Subadult Growth Plate?"],"prefix":"10.1002","volume":"190","author":[{"ORCID":"https:\/\/orcid.org\/0009-0005-4349-0585","authenticated-orcid":false,"given":"Samantha H.","family":"Magrini","sequence":"first","affiliation":[{"name":"Department of Anthropology Kent State University  Kent Ohio USA"},{"name":"Department of Biomedical Sciences Northeast Ohio Medical University  Rootstown Ohio USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Scott R.","family":"McKinny","sequence":"additional","affiliation":[{"name":"Department of Anthropological Sciences Stony Brook University  Stony New York USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7003-0617","authenticated-orcid":false,"given":"Emilee N.","family":"Hart","sequence":"additional","affiliation":[{"name":"Department of Environmental Science &amp; Sustainability Drake University  Des Moines Iowa USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5358-9339","authenticated-orcid":false,"given":"Jesse W.","family":"Young","sequence":"additional","affiliation":[{"name":"Department of Biomedical Sciences Northeast Ohio Medical University  Rootstown Ohio USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6897-8027","authenticated-orcid":false,"given":"Masato","family":"Nakatsukasa","sequence":"additional","affiliation":[{"name":"Department of Physical Anthropology Kyoto University  Kyoto Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"C. 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