{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,19]],"date-time":"2026-04-19T18:20:26Z","timestamp":1776622826996,"version":"3.51.2"},"reference-count":30,"publisher":"Wiley","issue":"8","license":[{"start":{"date-parts":[[2005,5,5]],"date-time":"2005-05-05T00:00:00Z","timestamp":1115251200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Knee surg. sports traumatol. arthrosc."],"published-print":{"date-parts":[[2005,11]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Open kinetic chain (OKC) knee extensor resistance training has lost favour in rehabilitation of patients with knee ACLD due to concerns that this exercise is harmful to the remaining portion of the ACL and its secondary stabilizers, and will be less effective in improving function. In this randomized, single\u2010blind clinical trial, closed and OKC knee extensor training were compared for their effects on knee laxity and function in patients with ACLD knees. Sixty\u2010four patients with a diagnosis of knee ACLD (49\u00a0M, 15 F; mean age=30 years) were measured for knee laxity, using a ligament arthrometer, and function with the Hughston Clinic knee self\u2010assessment questionnaire and maximal effort single leg jump testing. Between the above tests and identical tests carried out 6 weeks later, subjects trained using either open or closed kinetic chain resistance of their knee and hip extensors as part of formal physical therapy sessions three times per week for 6 weeks. The groups exhibited no statistically significant differences (<jats:italic>p<\/jats:italic>&lt;0.083) in outcome. These results indicate that knee extensor OKC training, as used in this study, can be safely applied to patients with knee ACL deficiency, and shows no superiority to CKC training.<\/jats:p>","DOI":"10.1007\/s00167-004-0603-8","type":"journal-article","created":{"date-parts":[[2005,5,4]],"date-time":"2005-05-04T11:24:22Z","timestamp":1115205862000},"page":"638-648","source":"Crossref","is-referenced-by-count":20,"title":["Knee extensors kinetic chain training in anterior cruciate ligament deficiency"],"prefix":"10.1002","volume":"13","author":[{"given":"Mark C.","family":"Perry","sequence":"first","affiliation":[{"name":"Division of Applied Biomedical Research GKT School of Biomedical Sciences King's College London Shepherd's House, Guy's Campus SE1 1UL London UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Matthew C.","family":"Morrissey","sequence":"additional","affiliation":[{"name":"Division of Applied Biomedical Research GKT School of Biomedical Sciences King's 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