title: Can technique modification training reduce knee moments in a landing task?
abstract: Anterior cruciate ligament (ACL) injuries are costly. Sidestep technique training reduces knee moments that load the ACL. This study examined whether landing technique training alters knee moments. Nineteen team sport athletes completed the study. Motion analysis and ground reaction forces were recorded before and after 6 weeks of technique modification. An inverse dynamic model was used to calculate three-dimensional knee loading. Pre- and postintervention scores were compared using paired t tests. Maximal knee flexion angle during landing was increased following training. There was no change in valgus or flexion moments, but an increase in peak internal rotation moment. This increase in internal rotation moment may increase the risk of ACL injury. However, the increased angle at which the peak internal rotation moment occurred at follow up may mitigate any increase in injury risk by reducing load transmission.
authors.affiliation: School of Psychology and Exercise Science, Murdoch University, Perth, and with the School of Sport Science, Exercise and Health, University of Western Australia, Perth, WA, Australia.
authors.forename: Alasdair R
authors.initials: AR
authors.lastname: Dempsey
authors.forename: Bruce C
authors.initials: BC
authors.lastname: Elliott
authors.forename: Bridget J
authors.initials: BJ
authors.lastname: Munro
authors.forename: Julie R
authors.initials: JR
authors.lastname: Steele
authors.forename: David G
authors.initials: DG
authors.lastname: Lloyd
mesh_terms: D000070598:Anterior Cruciate Ligament Injuries; D001696:Biomechanical Phenomena; D006801:Humans; D007718:Knee Injuries / Q000503:physiopathology / Q000517:prevention & control*; D008297:Male; D010806:Physical Education and Training / Q000379:methods*; D011187:Posture / Q000502:physiology; D016059:Range of Motion, Articular / Q000502:physiology; D012399:Rotation; D013177:Sports; D055815:Young Adult