{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,4]],"date-time":"2026-06-04T05:05:30Z","timestamp":1780549530291,"version":"3.54.1"},"reference-count":25,"publisher":"SAGE Publications","issue":"4","license":[{"start":{"date-parts":[[2026,1,26]],"date-time":"2026-01-26T00:00:00Z","timestamp":1769385600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"funder":[{"DOI":"10.13039\/501100001691","name":"Japan Society for the Promotion of Science","doi-asserted-by":"publisher","award":["JP19K11455"],"award-info":[{"award-number":["JP19K11455"]}],"id":[{"id":"10.13039\/501100001691","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001691","name":"Japan Society for the Promotion of Science","doi-asserted-by":"publisher","award":["JP20K19601"],"award-info":[{"award-number":["JP20K19601"]}],"id":[{"id":"10.13039\/501100001691","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Crowdfunding project: \u201cDevelopment of ballet teaching methods based on scientific findings\u201d"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Foot Ankle Int."],"published-print":{"date-parts":[[2026,4]]},"abstract":"<jats:sec>\n                    <jats:title>Background:<\/jats:title>\n                    <jats:p>Hallux valgus (HV) is a common forefoot deformity that may compromise lower-extremity biomechanics, particularly during turnout movements in ballet. However, the kinematic consequences of dynamic high-load, turnout-specific dance tasks remain unclear. This study investigated the relationship between the degree of HV and lower-extremity joint kinematics in ballet dancers.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods:<\/jats:title>\n                    <jats:p>\n                      Fourteen female ballet dancers with visible HV (mean HV angle: 26.5\u2009\u00b1\u20098.6 degrees) performed 3 tasks:\n                      <jats:italic toggle=\"yes\">demi-pli\u00e9, saut\u00e9<\/jats:italic>\n                      , and\n                      <jats:italic toggle=\"yes\">grand jet\u00e9<\/jats:italic>\n                      . A 10-camera motion capture system and a force plate were used to assess foot and knee kinematics during task-specific peak-load phases.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>\n                      Across tasks, the mean medial longitudinal arch angle ranged from approximately 136 to 141 degrees. Significant positive correlations were observed between HV angle and midfoot-forefoot inversion during all tasks (\n                      <jats:italic toggle=\"yes\">r<\/jats:italic>\n                      \u2009=\u20090.61-0.76,\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      \u2009&lt;\u2009.05). During the\n                      <jats:italic toggle=\"yes\">grand jet\u00e9<\/jats:italic>\n                      , a greater degree of HV was also associated with an increased medial longitudinal arch angle (\n                      <jats:italic toggle=\"yes\">r<\/jats:italic>\n                      \u2009=\u20090.64,\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      \u2009=\u2009.04), greater knee valgus (\n                      <jats:italic toggle=\"yes\">r<\/jats:italic>\n                      \u2009=\u20090.64,\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      \u2009=\u2009.04), and reduced hindfoot-midfoot inversion (\n                      <jats:italic toggle=\"yes\">r<\/jats:italic>\n                      \u2009=\u2009\u22120.64,\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      \u2009=\u2009.04), reflecting a pronated foot posture and altered kinetic chain alignment.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion:<\/jats:title>\n                    <jats:p>In this small case series, greater HV was correlated with altered foot and knee kinematics, particularly under high-load, single-leg conditions. These results underscore the importance of task-specific assessments in dancers.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Level of Evidence:<\/jats:title>\n                    <jats:p>Level IV, case series.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/10711007251408456","type":"journal-article","created":{"date-parts":[[2026,1,27]],"date-time":"2026-01-27T05:20:59Z","timestamp":1769491259000},"page":"541-548","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":0,"title":["Degree of Hallux Valgus Is Associated With Dynamic Foot and Knee Kinematics in Ballet Turnout Movements"],"prefix":"10.1177","volume":"47","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4052-7240","authenticated-orcid":false,"given":"Nahoko","family":"Sato","sequence":"first","affiliation":[{"name":"Faculty of Rehabilitation Sciences, Nagoya Gakuin University, Nagoya, Aichi, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Haruka","family":"Seki","sequence":"additional","affiliation":[{"name":"Japan Ballet Educational Association, Shinjuku, Tokyo, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6768-8423","authenticated-orcid":false,"given":"Naoko","family":"Oba","sequence":"additional","affiliation":[{"name":"Faculty of Sport Science, Yamanashi Gakuin University, Kofu, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1199-9940","authenticated-orcid":false,"given":"Akito","family":"Miura","sequence":"additional","affiliation":[{"name":"Faculty of Human Sciences, Waseda University, Tokorozawa, Saitama, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2026,1,26]]},"reference":[{"key":"e_1_3_2_2_2","doi-asserted-by":"publisher","DOI":"10.1097\/JSM.0b013e3182887f32"},{"key":"e_1_3_2_3_2","doi-asserted-by":"publisher","DOI":"10.1111\/j.2517-6161.1995.tb02031.x"},{"key":"e_1_3_2_4_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.gaitpost.2011.10.363"},{"key":"e_1_3_2_5_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.gaitpost.2011.11.012"},{"key":"e_1_3_2_6_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.jbiomech.2019.03.017"},{"key":"e_1_3_2_7_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.jbiomech.2021.110711"},{"key":"e_1_3_2_8_2","doi-asserted-by":"publisher","DOI":"10.1186\/s13047-019-0318-1"},{"key":"e_1_3_2_9_2","doi-asserted-by":"publisher","DOI":"10.1080\/14763141.2017.1343864"},{"key":"e_1_3_2_10_2","doi-asserted-by":"publisher","DOI":"10.3113\/FAI.2007.0759"},{"key":"e_1_3_2_11_2","doi-asserted-by":"publisher","DOI":"10.12678\/1089-313X.18.2.86"},{"key":"e_1_3_2_12_2","doi-asserted-by":"publisher","DOI":"10.3390\/jcm13051189"},{"key":"e_1_3_2_13_2","doi-asserted-by":"publisher","DOI":"10.2522\/ptj.20080298"},{"key":"e_1_3_2_14_2","doi-asserted-by":"publisher","DOI":"10.1177\/0363546504269591"},{"key":"e_1_3_2_15_2","doi-asserted-by":"publisher","DOI":"10.1177\/0363546507308362"},{"key":"e_1_3_2_16_2","doi-asserted-by":"publisher","DOI":"10.7547\/21-030"},{"key":"e_1_3_2_17_2","doi-asserted-by":"publisher","DOI":"10.1002\/jfa2.12043"},{"key":"e_1_3_2_18_2","doi-asserted-by":"publisher","DOI":"10.1186\/1757-1146-3-21"},{"key":"e_1_3_2_19_2","doi-asserted-by":"publisher","DOI":"10.1186\/s13244-025-01945-3"},{"issue":"4","key":"e_1_3_2_20_2","first-page":"874","article-title":"Three-dimensional analysis of a ballet dancer with ischial tuberosity apophysitis. A case study","volume":"13","author":"Pohjola H","year":"2014","unstructured":"Pohjola H, Sayers M, Mellifont R, Mellifont D, Venoj\u00e4rvi M. Three-dimensional analysis of a ballet dancer with ischial tuberosity apophysitis. A case study. 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