{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,7]],"date-time":"2026-10-07T03:14:05Z","timestamp":1791342845648,"version":"4.3.1"},"reference-count":27,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2014,3,20]],"date-time":"2014-03-20T00:00:00Z","timestamp":1395273600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Scandinavian Med Sci Sports"],"published-print":{"date-parts":[[2015,6]]},"abstract":"This study aimed to clarify the relationship between knee flexor strength and hamstring muscle morphology after anterior cruciate ligament (ACL<\/jats:styled-content>) reconstruction using the semitendinosus (ST<\/jats:styled-content>) tendon and to determine the causative factors of decreased knee flexor muscle strength. Fourteen male and ten female patients who resumed sports activities after surgery participated in the experiment. Isometric knee flexion torque was measured at 30\u00b0, 45\u00b0, 60\u00b0, 90\u00b0, and 105\u00b0 of knee flexion. Magnetic resonance imaging (MRI<\/jats:styled-content>) was used to calculate ST<\/jats:styled-content> muscle length and hamstring muscle volume, and to confirm the status of ST<\/jats:styled-content> tendon regeneration. The correlation between the MRI<\/jats:styled-content> findings and flexor strength was analyzed. Regenerated ST<\/jats:styled-content> tendon was confirmed in 21 of the 24 patients, but muscle volume (87.6%) and muscle length (74.5%) of the ST<\/jats:styled-content> in the operated limb were significantly smaller than those in the normal limb. The percentage of the knee flexion torque of the operated limb compared with that of the normal was apparently lower at 105\u00b0 (69.1%) and 90\u00b0 (68.6%) than at 60\u00b0 (84.4%). Tendon regeneration, ST<\/jats:styled-content> muscle shortening, and ST<\/jats:styled-content> muscle atrophy correlated with decreased knee flexion torque. These results indicated that preserving the morphology of the ST<\/jats:styled-content> muscle\u2010tendon complex is important.<\/jats:p>","DOI":"10.1111\/sms.12205","type":"journal-article","created":{"date-parts":[[2014,3,20]],"date-time":"2014-03-20T07:01:26Z","timestamp":1395298886000},"page":"301-307","source":"Crossref","is-referenced-by-count":70,"title":["Evaluation of hamstring muscle strength and morphology after anterior cruciate ligament reconstruction"],"prefix":"10.1111","volume":"25","author":[{"given":"Y.","family":"Nomura","sequence":"first","affiliation":[{"name":"Graduate School of Sport Sciences Waseda University Saitama Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"R.","family":"Kuramochi","sequence":"additional","affiliation":[{"name":"School of Health and Sport Science Chukyo University Aichi 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