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dc.contributor.authorSanderson-Hull, Donna Maria
dc.date.accessioned2015-07-28T10:05:37Z
dc.date.available2015-07-28T10:05:37Z
dc.date.issued2014-04
dc.identifier.urihttp://hdl.handle.net/10369/7080
dc.description.abstractObjectives Dynamic knee valgus has been associated with increased risk of anterior cruciate lig-ament (ACL) injury and patellofemoral pain syndrome (PFPS) especially in females. The purpose of this study was to examine the association between selected lower limb range of movement (ROM) and strength characteristics with dynamic knee val-gus during a single leg squat. Design A Cross-sectional study design was used. Setting The study took place in the institution of Cardiff Metropolitan University. Participants The participants were 21 un-injured females with a mean age of 20.3 +/− 1.5 years involved in running based sporting activities for, on average, a minimum of 30 minutes, 3 times per week. Main Outcome Measures Frontal plane dynamic knee valgus during single leg squatting was measured using video analysis software. Ankle dorsiflexion (DF) ROM, hip internal and external ro-tation ROM, hip abductor strength, prone knee flexion ROM and hip extension ca-pacity were the independent variables tested for association with dynamic knee val-gus. Results Non-dominant limbs exhibited greater dynamic knee valgus than dominant (p = 0.006). Reduced DF ROM negatively correlated with dynamic knee valgus in the non-dominant limb only (p = 0.001) with significant predictable variance with re-duced hip abductor strength, increased prone knee flexion ROM and reduced hip ex-tension capacity after regression analysis. No predictors of variance were revealed on the dominant limb. Both dominant and non-dominant dynamic knee valgus had non-significant moderate negative correlation to hip abductor weakness and no correlation with hip internal or external rotation. Conclusions Non-dominant dynamic knee valgus is associated with reduced ankle DF and a cumu-lative effect of hip abductor weakness, prone knee flexion flexibility and reduced hip extension capacity. The lack of any such associations on the dominant limb and the significantly lower dynamic knee valgus suggest that other neuromuscular systems are controlling lower limb stability. It is recommended clinicians assess for side-to-side differences during injury prevention screening and address these musculoskeletal associations with dynamic knee valgus to reduce injury risk.en_US
dc.language.isoenen_US
dc.subjectDynamic knee valgusen_US
dc.subjectsingle leg squaten_US
dc.subjectlower limben_US
dc.subjectleg dominanceen_US
dc.subjectACL injury risken_US
dc.subjectpatellofemoral pain syndrome (PFPS)en_US
dc.titleLOWER LIMB RANGE OF MOVEMENT AND STRENGTH CHARACTERISTICS ASSOCIATED WITH DYNAMIC KNEE VALGUS IN ACTIVE YOUNG FEMALESen_US
dc.typeThesisen_US


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