{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,22]],"date-time":"2026-09-22T00:19:26Z","timestamp":1790036366565,"version":"4.0.1"},"reference-count":37,"publisher":"Wiley","issue":"5","license":[{"start":{"date-parts":[[2020,1,27]],"date-time":"2020-01-27T00:00:00Z","timestamp":1580083200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2020,1,27]],"date-time":"2020-01-27T00:00:00Z","timestamp":1580083200000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"},{"start":{"date-parts":[[2020,1,27]],"date-time":"2020-01-27T00:00:00Z","timestamp":1580083200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.elsevier.com\/tdm\/userlicense\/1.0\/"},{"start":{"date-parts":[[2020,1,27]],"date-time":"2020-01-27T00:00:00Z","timestamp":1580083200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.elsevier.com\/legal\/tdmrep-license"}],"content-domain":{"domain":["arthroscopyjournal.org","clinicalkey.com","clinicalkey.com.au","clinicalkey.es","clinicalkey.fr","clinicalkey.jp","elsevier.com","sciencedirect.com"],"crossmark-restriction":true},"short-container-title":["Arthroscopy"],"published-print":{"date-parts":[[2020,5]]},"abstract":"<jats:sec>\n                    <jats:title>Purpose<\/jats:title>\n                    <jats:p>To compare isometric hamstring strength deficits, knee laxity, functional outcomes, and patient\u2010reported outcomes between patients who underwent anterior cruciate ligament (ACL) reconstruction with doubled semitendinosus and gracilis tendon autograft (ST\/G) versus quadrupled semitendinosus autograft (ST), at a minimum follow\u2010up of 1\u2010year postoperatively.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>Patients who underwent ACL reconstruction with ST\/G or ST hamstring autografts were retrospectively identified. Isometric hamstring strength was tested with a hand\u2010held dynamometer at 30, 60, and 90\u00b0 of knee flexion. Anterior knee laxity was assessed using a KT\u20101000 arthrometer. Functional outcomes were collected using the single\u2010leg hop test and single\u2010leg squat test. Side\u2010to\u2010side differences were determined and compared between the ST\/G and ST groups. Patient\u2010reported outcomes were collected on all patients.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      Eighty\u2010four patients who underwent ST\/G (n\u00a0= 34) or ST (n\u00a0= 50) autograft ACL reconstruction were recruited to participate in this study. There was no difference in knee laxity between the groups. Side\u2010to\u2010side hamstring strength deficits increased with increased flexion angles. At 90\u00b0 of flexion, the ST\/G group had a significantly greater flexion strength deficit compared with the ST group (37.8 \u00b1 15.1% vs 24.7 \u00b1 12.5%,\n                      <jats:italic>P<\/jats:italic>\n                      &lt; .001). Aside from a significant difference in the KOOS pain Score (\n                      <jats:italic>P<\/jats:italic>\n                      .045), no other significant differences in functional or patient reported outcomes between the groups were identified.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Patients who underwent ACL reconstruction with ST\/G compared with ST autograft have a significantly greater isometric flexion strength deficit at 90\u00b0 of flexion. Future investigations are required to determine the clinical relevance of this difference and whether specialized therapy protocols can mitigate this deficit.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Level of Evidence<\/jats:title>\n                    <jats:p>Level III, retrospective comparative study.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1016\/j.arthro.2020.01.019","type":"journal-article","created":{"date-parts":[[2020,1,27]],"date-time":"2020-01-27T20:03:37Z","timestamp":1580155417000},"page":"1409-1416","update-policy":"https:\/\/doi.org\/10.1016\/elsevier_cm_policy","source":"Crossref","is-referenced-by-count":15,"title":["Assessment of Flexion Strength Following Single\u2010\u00a0Versus Double\u2010Hamstring Tendon Harvest for Anterior Cruciate Ligament Reconstruction"],"prefix":"10.1002","volume":"36","author":[{"given":"Alex","family":"Hu","sequence":"first","affiliation":[{"name":"Department of Orthopedic Surgery Northwestern Memorial Hospital Chicago Illinois U.S.A."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Cort D.","family":"Lawton","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery Northwestern Memorial Hospital Chicago Illinois U.S.A."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Patrick","family":"Nelson","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery Northwestern Memorial Hospital Chicago Illinois U.S.A."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ryan S.","family":"Selley","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery Northwestern Memorial Hospital Chicago Illinois U.S.A."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Patrick","family":"Sweeney","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery Northwestern Memorial Hospital Chicago Illinois U.S.A."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"John","family":"Tuttle","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery Northwestern Memorial Hospital Chicago Illinois U.S.A."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Daniel J.","family":"Johnson","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery Northwestern Memorial Hospital Chicago Illinois U.S.A."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Earvin S.","family":"Balderama","sequence":"additional","affiliation":[{"name":"Department of Mathematics and Statistics Loyola University Chicago Chicago Illinois U.S.A."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Stephen M.","family":"Gryzlo","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery Northwestern Memorial Hospital Chicago Illinois U.S.A."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michael A.","family":"Terry","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery Northwestern Memorial Hospital Chicago Illinois 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