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dc.contributor.authorLee, Marcus JC
dc.contributor.authorReid, Siobhan L
dc.contributor.authorElliott, Bruce C
dc.contributor.authorLloyd, David G
dc.date.accessioned2017-05-03T15:56:54Z
dc.date.available2017-05-03T15:56:54Z
dc.date.issued2009
dc.date.modified2011-08-24T07:14:12Z
dc.identifier.issn0195-9131
dc.identifier.doi10.1249/MSS.0b013e3181a55200
dc.identifier.urihttp://hdl.handle.net/10072/40262
dc.description.abstractPurpose: Hamstrings injury/reinjury is common, but functional reasons for this remain unclear. This study identified bilateral differences in swing phase running biomechanics and isokinetic strength, between the previously hamstring-injured and uninjured limbs of male athletes involved in sprint-based sports. Methods: Athletes, injury-free during testing, underwent three-dimensional motion analyses to determine bilateral joint kinematics and kinetics during submaximal sprinting. Various hip and knee isokinetic strength tests were performed bilaterally using a Biodex dynamometer. Peak torque (PT) and total work (TW; normalized to body mass) were collected isokinetically from concentric hamstrings (CH), concentric quadriceps (CQ), concentric hip flexors (CHF), and eccentric hamstrings (EH). Three PT and TW ratios were created, namely, CH/CQ, EH/CQ, and EH/CHF, and were compared between the previously injured and uninjured limbs. Results: Lower limb swing phase kinematics and kinetics were similar. Only peak hip flexion angle in late swing was significantly reduced (1.9੠in the previously injured limb. EH PT was decreased (26.2 N筷kg-1) and occurred at shorter hamstring lengths on the previously injured side, whereas CQ TW was increased by 13.6 J竧-1. EH/CQ and EH/CHF ratios for PT and TW were reduced on the previously injured limbs. Conclusions: Although swing phase biomechanics of submaximal sprinting were similar between limbs, the previously injured hamstrings did display significant weakness eccentrically. Residual eccentric weakness may predispose this muscle group to reinjury during late swing, compared with the uninjured limb, because the functional eccentric demand on both limbs was similar. Furthermore, the EH/CHF ratios may better reflect muscle function during sprinting, having the potential to influence rehabilitation to prevent reinjury.
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.languageEnglish
dc.language.isoeng
dc.publisherLippincott Williams & Wilkins
dc.publisher.placeUnited States
dc.relation.ispartofstudentpublicationN
dc.relation.ispartofpagefrom1942
dc.relation.ispartofpageto1951
dc.relation.ispartofissue10
dc.relation.ispartofjournalMedicine and Science in Sports and Exercise
dc.relation.ispartofvolume41
dc.rights.retentionY
dc.subject.fieldofresearchSports Medicine
dc.subject.fieldofresearchBiomechanics
dc.subject.fieldofresearchHuman Movement and Sports Sciences
dc.subject.fieldofresearchMedical Physiology
dc.subject.fieldofresearchPublic Health and Health Services
dc.subject.fieldofresearchcode110604
dc.subject.fieldofresearchcode110601
dc.subject.fieldofresearchcode1106
dc.subject.fieldofresearchcode1116
dc.subject.fieldofresearchcode1117
dc.titleRunning Biomechanics and Lower Limb Strength Associated with Prior Hamstring Injury
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.date.issued2009
gro.hasfulltextNo Full Text
gro.griffith.authorLloyd, David


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