Knee movement patterns of injured and uninjured adolescent basketball players when landing from a jump: A case-control study

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dc.contributor.authorLouw, Quinetteen_ZA
dc.contributor.authorGrimmer, Karenen_ZA
dc.contributor.authorVaughan, Christopheren_ZA
dc.date.accessioned2015-10-12T10:59:31Z
dc.date.available2015-10-12T10:59:31Z
dc.date.issued2006en_ZA
dc.description.abstractBACKGROUND:A common knee injury mechanism sustained during basketball is landing badly from a jump. Landing is a complex task and requires good coordination, dynamic muscle control and flexibility. For adolescents whose coordination and motor control has not fully matured, landing badly from a jump can present a significant risk for injury. There is currently limited biomechanical information regarding the lower limb kinetics of adolescents when jumping, specifically regarding jump kinematics comparing injured with uninjured adolescents. This study reports on an investigation of biomechanical differences in landing patterns of uninjured and injured adolescent basketball players. METHODS: A matched case-control study design was employed. Twenty-two basketball players aged 14-16 years participated in the study: eleven previously knee-injured and eleven uninjured players matched with cases for age, gender, weight, height and years of play, and playing for the same club. Six high-speed, three-dimensional Vicon 370 cameras (120 Hz), Vicon biomechanical software and SAS Version 8 software were employed to analyse landing patterns when subjects performed a "jump shot". Linear correlations determined functional relationships between the biomechanical performance of lower limb joints, and paired t-tests determined differences between the normalised peak biomechanical parameters. RESULTS: The average peak vertical ground reaction forces between the cases and controls were similar. The average peak ground reaction forces between the cases and controls were moderately correlated (r = -0.47). The control (uninjured) players had significantly greater hip and knee flexion angles and significantly greater eccentric activity on landing than the uninjured cases (p < 0.01). CONCLUSION: The findings of the study indicate that players with a history of knee injuries had biomechanically compromised landing techniques when compared with uninjured players matched for gender, age and club. Descriptions (norms) of expected levels of knee control, proprioceptive acuity and eccentric strength relative to landing from a jump, at different ages and physical developmental stages, would assist clinicians and coaches to identify players with inappropriate knee performance comparable to their age or developmental stage.en_ZA
dc.identifier.apacitationLouw, Q., Grimmer, K., & Vaughan, C. (2006). Knee movement patterns of injured and uninjured adolescent basketball players when landing from a jump: A case-control study. <i>BMC Musculoskeletal Disorders</i>, http://hdl.handle.net/11427/14201en_ZA
dc.identifier.chicagocitationLouw, Quinette, Karen Grimmer, and Christopher Vaughan "Knee movement patterns of injured and uninjured adolescent basketball players when landing from a jump: A case-control study." <i>BMC Musculoskeletal Disorders</i> (2006) http://hdl.handle.net/11427/14201en_ZA
dc.identifier.citationLouw, Q., Grimmer, K., & Vaughan, C. (2006). Knee movement patterns of injured and uninjured adolescent basketball players when landing from a jump: a case-control study. BMC musculoskeletal disorders, 7(1), 22.en_ZA
dc.identifier.ris TY - Journal Article AU - Louw, Quinette AU - Grimmer, Karen AU - Vaughan, Christopher AB - BACKGROUND:A common knee injury mechanism sustained during basketball is landing badly from a jump. Landing is a complex task and requires good coordination, dynamic muscle control and flexibility. For adolescents whose coordination and motor control has not fully matured, landing badly from a jump can present a significant risk for injury. There is currently limited biomechanical information regarding the lower limb kinetics of adolescents when jumping, specifically regarding jump kinematics comparing injured with uninjured adolescents. This study reports on an investigation of biomechanical differences in landing patterns of uninjured and injured adolescent basketball players. METHODS: A matched case-control study design was employed. Twenty-two basketball players aged 14-16 years participated in the study: eleven previously knee-injured and eleven uninjured players matched with cases for age, gender, weight, height and years of play, and playing for the same club. Six high-speed, three-dimensional Vicon 370 cameras (120 Hz), Vicon biomechanical software and SAS Version 8 software were employed to analyse landing patterns when subjects performed a "jump shot". Linear correlations determined functional relationships between the biomechanical performance of lower limb joints, and paired t-tests determined differences between the normalised peak biomechanical parameters. RESULTS: The average peak vertical ground reaction forces between the cases and controls were similar. The average peak ground reaction forces between the cases and controls were moderately correlated (r = -0.47). The control (uninjured) players had significantly greater hip and knee flexion angles and significantly greater eccentric activity on landing than the uninjured cases (p < 0.01). CONCLUSION: The findings of the study indicate that players with a history of knee injuries had biomechanically compromised landing techniques when compared with uninjured players matched for gender, age and club. Descriptions (norms) of expected levels of knee control, proprioceptive acuity and eccentric strength relative to landing from a jump, at different ages and physical developmental stages, would assist clinicians and coaches to identify players with inappropriate knee performance comparable to their age or developmental stage. DA - 2006 DB - OpenUCT DO - 10.1186/1471-2474-7-22 DP - University of Cape Town J1 - BMC Musculoskeletal Disorders LK - https://open.uct.ac.za PB - University of Cape Town PY - 2006 T1 - Knee movement patterns of injured and uninjured adolescent basketball players when landing from a jump: A case-control study TI - Knee movement patterns of injured and uninjured adolescent basketball players when landing from a jump: A case-control study UR - http://hdl.handle.net/11427/14201 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/14201
dc.identifier.urihttp://dx.doi.org/10.1186/1471-2474-7-22
dc.identifier.vancouvercitationLouw Q, Grimmer K, Vaughan C. Knee movement patterns of injured and uninjured adolescent basketball players when landing from a jump: A case-control study. BMC Musculoskeletal Disorders. 2006; http://hdl.handle.net/11427/14201.en_ZA
dc.language.isoengen_ZA
dc.publisherBioMed Central Ltden_ZA
dc.publisher.departmentDepartment of Human Biologyen_ZA
dc.publisher.facultyFaculty of Health Sciencesen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.rightsThis is an Open Access article distributed under the terms of the Creative Commons Attribution Licenseen_ZA
dc.rights.urihttp://creativecommons.org/licenses/by/2.0en_ZA
dc.sourceBMC Musculoskeletal Disordersen_ZA
dc.source.urihttp://www.biomedcentral.com/bmcmusculoskeletdisord/en_ZA
dc.subject.otherMusculoskeletal Disordersen_ZA
dc.titleKnee movement patterns of injured and uninjured adolescent basketball players when landing from a jump: A case-control studyen_ZA
dc.typeJournal Articleen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceArticleen_ZA
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