{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,7]],"date-time":"2026-08-07T17:23:59Z","timestamp":1786123439784,"version":"build-2736575974"},"reference-count":37,"publisher":"Wiley","issue":"12","license":[{"start":{"date-parts":[[2023,10,19]],"date-time":"2023-10-19T00:00:00Z","timestamp":1697673600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2023,10,19]],"date-time":"2023-10-19T00:00:00Z","timestamp":1697673600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"},{"start":{"date-parts":[[2023,10,19]],"date-time":"2023-10-19T00:00:00Z","timestamp":1697673600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.springernature.com\/gp\/researchers\/text-and-data-mining"},{"start":{"date-parts":[[2023,10,19]],"date-time":"2023-10-19T00:00:00Z","timestamp":1697673600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/www.springernature.com\/gp\/researchers\/text-and-data-mining"}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["Knee surg. sports traumatol. arthrosc."],"published-print":{"date-parts":[[2023,12]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Purpose<\/jats:title>\n                    <jats:p>This study aimed to determine the factors affecting knee extensor strength 6\u00a0months after anterior cruciate ligament (ACL) reconstruction using autograft hamstring tendon.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>\n                      144 patients who could undergo regular follow\u2010up after ACL reconstruction were divided into 2\u00a0groups: those with greater than 90% (Group A:\n                      <jats:italic>n<\/jats:italic>\n                      \u2009=\u200995) and less than 85% (Group B:\n                      <jats:italic>n<\/jats:italic>\n                      \u2009=\u200949) isokinetic knee contraction at 60\u00b0\/s 6\u00a0months post\u2010ACL reconstruction. Basic information, injury status, limited preoperative knee extension, and knee extensor strength at 3 and 6\u00a0months postoperatively were compared between the groups. Multivariate logistic analysis was performed and included variables that showed statistically significant differences between the groups in the univariate analysis. In addition, the cut\u2010off value for the limb symmetry index (LSI) at 3\u00a0months postoperatively needed to exceed an LSI of 90% at 6\u00a0months postoperatively was calculated using the receiver operating characteristics curve.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      Age, preoperative waiting period, limited preoperative knee extension, and knee extensor strength at 3\u00a0months postoperatively were significantly different between the two groups. The multivariate logistic analysis showed that all the variables affected the improvement in knee extensor strength at 6\u00a0months postoperatively. Limited preoperative knee extension was the most significant factor (odds ratio: 15.1, 95% confidence interval: 2.57\u2013118.56,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u20090.01). The LSI cut\u2010off value at 3\u00a0months postoperatively was 72.0%.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>Key factors in achieving the necessary knee extensor strength criteria for return to sports at 6\u00a0months post\u2010ACL reconstruction include addressing limited preoperative knee extension and achieving an LSI\u2009\u2265\u200972% in knee extensor strength at 3\u00a0months postoperatively.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Level of evidence<\/jats:title>\n                    <jats:p>Level III.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1007\/s00167-023-07620-8","type":"journal-article","created":{"date-parts":[[2023,10,19]],"date-time":"2023-10-19T13:01:46Z","timestamp":1697720506000},"page":"5621-5628","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Limited preoperative knee extension in anterior cruciate ligament reconstruction using a hamstring tendon affects improvement of postoperative knee extensor strength"],"prefix":"10.1002","volume":"31","author":[{"given":"Takuya","family":"Sengoku","sequence":"first","affiliation":[{"name":"Section of Rehabilitation Kanazawa University Hospital 13\u20101 Takaramachi 920\u20108641 Kanazawa Japan"},{"name":"Department of Orthopaedic Surgery Graduate School of Medical Sciences Kanazawa University 13\u20101 Takaramachi 920\u20108641 Kanazawa Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9286-5276","authenticated-orcid":false,"given":"Junsuke","family":"Nakase","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery Graduate School of Medical Sciences Kanazawa University 13\u20101 Takaramachi 920\u20108641 Kanazawa Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yushin","family":"Mizuno","sequence":"additional","affiliation":[{"name":"Section of Rehabilitation Kanazawa University Hospital 13\u20101 Takaramachi 920\u20108641 Kanazawa Japan"},{"name":"Department of Orthopaedic Surgery Graduate School of Medical Sciences Kanazawa University 13\u20101 Takaramachi 920\u20108641 Kanazawa Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tomoyuki","family":"Kanayama","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery Graduate School of Medical Sciences Kanazawa University 13\u20101 Takaramachi 920\u20108641 Kanazawa Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yoshihiro","family":"Ishida","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery Graduate School of Medical Sciences Kanazawa University 13\u20101 Takaramachi 920\u20108641 Kanazawa Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yusuke","family":"Yanatori","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery Graduate School of Medical Sciences Kanazawa University 13\u20101 Takaramachi 920\u20108641 Kanazawa Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yu","family":"Arima","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery Graduate School of Medical Sciences Kanazawa University 13\u20101 Takaramachi 920\u20108641 Kanazawa 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June 2023","order":1,"name":"received","label":"Received","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"2 October 2023","order":2,"name":"accepted","label":"Accepted","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"19 October 2023","order":3,"name":"first_online","label":"First Online","group":{"name":"ArticleHistory","label":"Article History"}},{"order":1,"name":"Ethics","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"The authors declare that they have no conflicts of interest.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Conflict of interest"}},{"value":"This study was conducted with the approval of the Ethics Review Committee of Kanazawa University (1860).","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethical approval"}},{"value":"Informed consent was obtained from all individuals who participated in this 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