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    Higher anterior knee laxity influences the landing biomechanics displayed by pubescent girls

    Access Status
    Fulltext not available
    Authors
    Wild, Catherine
    Munro, B.
    Steele, J.
    Date
    2017
    Type
    Journal Article
    
    Metadata
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    Citation
    Wild, C. and Munro, B. and Steele, J. 2017. Higher anterior knee laxity influences the landing biomechanics displayed by pubescent girls. Journal of Sports Sciences. 35 (2): pp. 159-165.
    Source Title
    Journal of Sports Sciences
    DOI
    10.1080/02640414.2016.1159715
    ISSN
    0264-0414
    School
    School of Physiotherapy and Exercise Science
    URI
    http://hdl.handle.net/20.500.11937/50828
    Collection
    • Curtin Research Publications
    Abstract

    © 2016 Informa UK Limited, trading as Taylor & Francis Group.Despite an increase in anterior knee laxity (AKL) during the adolescent growth spurt in girls, it is unknown whether landing biomechanics are affected by this change. This study investigated whether pubescent girls with higher AKL displayed differences in their lower limb strength or landing biomechanics when performing a horizontal leap movement compared to girls with lower AKL. Forty-six pubescent girls (10–13 years) were tested at the time of their peak height velocity (PHV). Passive AKL was quantified and used to classify participants into higher (HAKL; peak displacement > 4 mm) and lower (LAKL; peak displacement < 3 mm) AKL groups (n = 15/group). Three-dimensional kinematics, ground reaction forces (GRF) and muscle activation patterns were assessed during a horizontal leap landing. HAKL participants displayed significantly (P < 0.05) reduced hip abduction, increased hip abduction moments, as well as earlier hamstring muscle and later tibialis anterior activation compared to LAKL participants. Girls with HAKL displayed compensatory landing biomechanics, which are suggested to assist the functional stability of their knees during this dynamic task. Further research is warranted, however, to confirm or refute this notion.

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