LOWER LIMB RANGE OF MOVEMENT AND STRENGTH CHARACTERISTICS ASSOCIATED WITH DYNAMIC KNEE VALGUS IN ACTIVE YOUNG FEMALES
Sanderson-Hull, Donna Maria
MetadataShow full item record
Objectives 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.
- Masters Degrees (Sport) 
Showing items related by title, author, subject and abstract.
'Does hip range of motion influence the degree of lower limb valgus rotation in young active females?' Clarke, Hayley (Cardiff Metropolitan University, 2013)Background: Knee and ankle injuries have a higher incidence rate in female than male athletes. Dynamic knee valgus (DKV) has been highlighted as a cause of non-contact knee injuries. Aim: The main aim of the study was ...
Lower extremity kinematics whilst executing a cutting manoeuvre. A comparison between dominant and non-dominant legs. Implications for anterior cruciate ligament (ACL) injury Sadiq, Zara (University of Wales Institute Cardiff, 2010)Cutting manoeuvres have been associated biomechanically and clinically with of non-contact anterior cruciate ligament (ACL) injury. There is a disparity in ACL injury rates between dominant and non-dominant limbs. Currently ...
Jade-Finley, Jessica (Cardiff Metropolitan University, 2013)Background: Female athletes are suffering more injuries to the knees than male athletes and this can be due to lower limb alignment issues. If the biomechanics of the lower limb are altered then certain anatomical structures, ...