{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,26]],"date-time":"2025-12-26T10:44:19Z","timestamp":1766745859121,"version":"3.48.0"},"reference-count":21,"publisher":"Wiley","license":[{"start":{"date-parts":[[2025,12,26]],"date-time":"2025-12-26T00:00:00Z","timestamp":1766707200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["esskajournals.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Knee surg. sports traumatol. arthrosc."],"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Purpose<\/jats:title>\n                    <jats:p>To examine the association between knee valgus angles during single\u2010leg squats (SLS) and single\u2010leg hop landings (SLHL) in female athletes following anterior cruciate ligament reconstruction (ACLR), given the high risk of second ACL injuries related to dynamic knee valgus during landing.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>This cross\u2010sectional study included 15 female athletes (mean age: 17.2\u2009\u00b1\u20091.0 years) after ACLR. Kinematic data during SLS and SLHL were collected using a three\u2010dimensional motion analysis system composed of 10 infrared cameras and four force plates. Peak joint angles were analysed, and correlations between SLS and SLHL kinematics were evaluated.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      Significant positive correlations were found between SLS and SLHL for hip flexion (\n                      <jats:italic>r<\/jats:italic>\n                      \u2009=\u20090.68), hip adduction (\n                      <jats:italic>r<\/jats:italic>\n                      \u2009=\u20090.80), hip internal rotation (\n                      <jats:italic>r<\/jats:italic>\n                      \u2009=\u20090.90), knee valgus (\n                      <jats:italic>r<\/jats:italic>\n                      \u2009=\u20090.95), knee internal rotation (\n                      <jats:italic>r<\/jats:italic>\n                      \u2009=\u20090.99) and ankle eversion (\n                      <jats:italic>r<\/jats:italic>\n                      \u2009=\u20090.79). In both tasks, knee valgus was negatively correlated with hip flexion (SLS:\n                      <jats:italic>r<\/jats:italic>\n                      = \u20130.68; SLHL:\n                      <jats:italic>r<\/jats:italic>\n                      = \u20130.62) and hip internal rotation (SLS:\n                      <jats:italic>r<\/jats:italic>\n                      = \u20130.66; SLHL:\n                      <jats:italic>r<\/jats:italic>\n                      = \u20130.55) and positively correlated with hip adduction (SLS:\n                      <jats:italic>r<\/jats:italic>\n                      \u2009=\u20090.61; SLHL:\n                      <jats:italic>r<\/jats:italic>\n                      \u2009=\u20090.57).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>SLS and SLHL kinematics were evaluated approximately one year after ACLR and were significantly associated in female athletes. These findings suggest that the SLS may serve as a practical tool for identifying and addressing dynamic knee valgus during landing.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Level of Evidence<\/jats:title>\n                    <jats:p>Level III, cross\u2010sectional observational study.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/ksa.70246","type":"journal-article","created":{"date-parts":[[2025,12,26]],"date-time":"2025-12-26T10:41:48Z","timestamp":1766745708000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Kinematic association between single\u2010leg squat and hop landing in female athletes following anterior cruciate ligament reconstruction"],"prefix":"10.1002","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7109-2481","authenticated-orcid":false,"given":"Wataru","family":"Fukuda","sequence":"first","affiliation":[{"name":"Department of Physical Therapy The Taijukai Foundation (Social Medical Corporation) Kaisei General Hospital Sakaide City Kagawa Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Shigeki","family":"Yokoyama","sequence":"additional","affiliation":[{"name":"Faculty of Health Science Kyoto Tachibana University Kyoto City Kyoto Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yusuke","family":"Kataoka","sequence":"additional","affiliation":[{"name":"Department of Physical Therapy The Taijukai Foundation (Social Medical Corporation) Kaisei General Hospital Sakaide City Kagawa Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Shohei","family":"Kawakami","sequence":"additional","affiliation":[{"name":"Department of Physical Therapy The Taijukai Foundation (Social Medical Corporation) Kaisei General Hospital Sakaide City Kagawa Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Noriyuki","family":"Gomi","sequence":"additional","affiliation":[{"name":"Center of Orthopaedic Surgery The Taijukai Foundation (Social Medical Corporation) Kaisei General Hospital Sakaide City Kagawa Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2025,12,26]]},"reference":[{"key":"e_1_2_11_2_1","doi-asserted-by":"crossref","first-page":"718","DOI":"10.1016\/j.jelekin.2014.07.007","article-title":"The reliability of biomechanical variables collected during single leg squat and landing tasks","volume":"24","author":"Alenezi F","year":"2014","journal-title":"J Electromyography Kinesiol"},{"key":"e_1_2_11_3_1","doi-asserted-by":"crossref","first-page":"587","DOI":"10.1177\/1941738120912846","article-title":"One in 5 athletes sustain reinjury upon 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abduction and internal rotation motions during a drop vertical jump","volume":"23","author":"Ishida T","year":"2024","journal-title":"Sports Biomech"},{"key":"e_1_2_11_13_1","doi-asserted-by":"crossref","first-page":"333","DOI":"10.1177\/0363546517732750","article-title":"Hip and ankle kinematics in noncontact anterior cruciate ligament injury situations: video analysis using model\u2010based image matching","volume":"46","author":"Koga H","year":"2018","journal-title":"Am J Sports Med"},{"key":"e_1_2_11_14_1","doi-asserted-by":"crossref","first-page":"2218","DOI":"10.1177\/0363546510373570","article-title":"Mechanisms for noncontact anterior cruciate ligament injuries: knee joint kinematics in 10 injury situations from female team handball and basketball","volume":"38","author":"Koga H","year":"2010","journal-title":"Am J Sports Med"},{"key":"e_1_2_11_15_1","doi-asserted-by":"crossref","first-page":"139","DOI":"10.1136\/bjsports-2018-099918","article-title":"Measuring only hop 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Arthroscopy"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/esskajournals.onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/ksa.70246","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,12,26]],"date-time":"2025-12-26T10:41:51Z","timestamp":1766745711000},"score":1,"resource":{"primary":{"URL":"https:\/\/esskajournals.onlinelibrary.wiley.com\/doi\/10.1002\/ksa.70246"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,12,26]]},"references-count":21,"alternative-id":["10.1002\/ksa.70246"],"URL":"https:\/\/doi.org\/10.1002\/ksa.70246","archive":["Portico"],"relation":{},"ISSN":["0942-2056","1433-7347"],"issn-type":[{"value":"0942-2056","type":"print"},{"value":"1433-7347","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025,12,26]]},"assertion":[{"value":"2025-09-04","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication 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