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    Lumbar load in adolescent fast bowlers: A prospective injury study

    Access Status
    Fulltext not available
    Authors
    Bayne, H.
    Elliott, B.
    Campbell, Amity
    Alderson, J.
    Date
    2014
    Type
    Journal Article
    
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    Citation
    Bayne, H. and Elliott, B. and Campbell, A. and Alderson, J. 2014. Lumbar load in adolescent fast bowlers: A prospective injury study. Journal of Science and Medicine in Sport.
    Source Title
    Journal of Science and Medicine in Sport
    DOI
    10.1016/j.jsams.2015.02.011
    ISSN
    1440-2440
    School
    School of Physiotherapy and Exercise Science
    URI
    http://hdl.handle.net/20.500.11937/7528
    Collection
    • Curtin Research Publications
    Abstract

    Objectives: This study aimed to identify modifiable mechanisms associated with low back injury in adolescent cricket fast bowlers. Design: A prospective study design examined the association between intrinsic risk factors, workload, bowling kinematics, lumbar load and low back injury incidence. Methods: Twenty-five injury free fast bowlers, aged 14-19 years, were assessed prior to the start of a cricket season and observed during the season for low back injuries. Results: The twelve bowlers who suffered a low back injury displayed; decreased hip flexion at front foot contact (46±6° vs 51±6°), increased pelvis rotation (287±11° vs 277±11°) increased thorax lateral flexion (50±6° vs 40±8°) at ball release, and larger peak lumbar flexion (10.5±4.9Nmkg-1 m-1 vs 6.9±2.5Nmkg-1 m-1) and lateral flexion moments (12.5±2.6Nmkg-1 m-1 vs 10.6±1.9Nmkg-1 m-1). They also exhibited reduced muscular endurance of the back extensors (103±33s vs 132±33s) and increased knee valgus angle during a single leg decline squat on the dominant (9±3° vs 5±4°) and non-dominant leg (9±4° vs 6±3°) in comparison to uninjured bowlers. Conclusions: Bowlers who experience greater lumbar loads during bowling, have reduced back extensor muscle endurance, and demonstrate impaired control of the lumbo-pelvic-hip complex, are at increased risk of low back injury. This combination of strength, control and biomechanical factors may be key mechanical elements of low back injury causation in adolescent fast bowlers.

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