{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T19:19:33Z","timestamp":1790795973041,"version":"4.1.0"},"reference-count":43,"publisher":"Wiley","issue":"8","license":[{"start":{"date-parts":[[2019,5,27]],"date-time":"2019-05-27T00:00:00Z","timestamp":1558915200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Scandinavian Med Sci Sports"],"published-print":{"date-parts":[[2019,8]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>After anterior cruciate ligament reconstruction (ACLR), there is a higher re\u2010injury rate to the contralateral limb in athletes who undergo surgery using a bone\u2010patellar\u2010tendon\u2010bone (BPTB) autograft than using a semitendinosus and gracilis hamstring tendon (HT) autograft. This may be influenced by differing lower\u2010limb loading asymmetries present when athletes of each graft type return to play (RTP). The aim of this study was to compare bilateral countermovement jump (CMJ) phase\u2010specific impulse asymmetries between athletes with BPTB and HT autografts 9\u00a0months post\u2010ACLR, and to identify the relationship between impulse and isokinetic strength asymmetries. Male field sport athletes with a BPTB (n\u00a0=\u00a022) or HT (n\u00a0=\u00a022) autograft were tested approximately 9\u00a0months post\u2010ACLR. An uninjured control group (n\u00a0=\u00a022) was also tested on a single occasion. Phase\u2010specific bilateral absolute impulse asymmetries were calculated during the CMJ and compared between groups using Kruskal\u2010Wallis and post\u2010hoc testing. A linear regression model was used to assess the relationship between impulse asymmetries and isokinetic concentric knee extensor strength asymmetries. BPTB athletes demonstrated greater impulse asymmetries than HT athletes during the eccentric (<jats:italic>P\u00a0=\u00a0<\/jats:italic>0.01) and concentric (<jats:italic>P\u00a0=\u00a0<\/jats:italic>0.008) phases of the jump. Isokinetic strength asymmetry was a significant predictor of CMJ concentric impulse asymmetry in both BPTB (<jats:italic>r<\/jats:italic><jats:sup>2<\/jats:sup>\u00a0=\u00a00.39) and HT athletes (<jats:italic>r<\/jats:italic><jats:sup>2<\/jats:sup>\u00a0=\u00a00.18) but not eccentric impulse asymmetry in any group. The greater loading asymmetries demonstrated by BPTB than HT athletes 9\u00a0months after ACLR may contribute to the differing incidence rates of contralateral ACL injury. The findings suggest that graft\u2010specific loading asymmetries should be targeted during rehabilitation prior to RTP.<\/jats:p>","DOI":"10.1111\/sms.13441","type":"journal-article","created":{"date-parts":[[2019,5,1]],"date-time":"2019-05-01T01:11:41Z","timestamp":1556673101000},"page":"1212-1222","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":53,"title":["Patellar and hamstring autografts are associated with different jump task loading asymmetries after ACL reconstruction"],"prefix":"10.1111","volume":"29","author":[{"given":"Joshua J.","family":"Miles","sequence":"first","affiliation":[{"name":"Sports Medicine Research Department Sports Surgery Clinic Dublin Ireland"},{"name":"Department for Health University of Bath Bath UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0434-1489","authenticated-orcid":false,"given":"Enda","family":"King","sequence":"additional","affiliation":[{"name":"Sports Medicine Research Department Sports Surgery Clinic Dublin Ireland"},{"name":"Department of Life Sciences University of Roehampton London UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3961-1805","authenticated-orcid":false,"given":"\u00c9anna Cian","family":"Falvey","sequence":"additional","affiliation":[{"name":"Sports Medicine Research Department Sports Surgery Clinic Dublin Ireland"},{"name":"Department of Medicine University College Cork Cork Ireland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8134-6764","authenticated-orcid":false,"given":"Katherine A. 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