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    Screening Hamstring Injury Risk Factors Multiple Times in a Season Does Not Improve the Identification of Future Injury Risk

    Opar, David A. and Ruddy, Joshua D. and Williams, Morgan D. and Maniar, Nirav and Hickey, Jack and Bourne, Matthew N. and Pizzari, Tania and Timmins, Ryan G. (2021) Screening Hamstring Injury Risk Factors Multiple Times in a Season Does Not Improve the Identification of Future Injury Risk. Medicine & Science in Sports & Exercise, 54 (2). pp. 321-329. ISSN 0195-9131

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    Purpose To determine if eccentric knee flexor strength and biceps femoris long head (BFlh) fascicle length were associated with prospective hamstring strain injury (HSI) in professional Australian Football players, and if more frequent assessments of these variables altered the association with injury risk. Methods Across two competitive seasons, 311 Australian Football players (455 player seasons) had their eccentric knee flexor strength during the Nordic hamstring exercise and BFlh architecture assessed at the start and end of preseason and in the middle of the competitive season. Player age and injury history were also collected in preseason. Prospective HSIs were recorded by team medical staff. Results Seventy-four player seasons (16%) sustained an index HSI. Shorter BFlh fascicles (<10.42 cm) increased HSI risk when assessed at multiple time points only (relative risk [RR], 1.9; 95% confidence interval [CI], 1.2–3.0). Neither absolute (N) nor relative (N·kg−1) eccentric knee flexor strength was associated with HSI risk, regardless of measurement frequency (RR range, 1.0–1.1); however, between-limb imbalance (>9%), when measured at multiple time points, was (RR, 1.8; 95% CI, 1.1–3.1). Prior HSI had the strongest univariable association with prospective HSI (RR, 2.9; 95% CI, 1.9–4.3). Multivariable logistic regression models identified a combination of prior HSI, BFlh architectural variables and between-limb imbalance in eccentric knee flexor strength as optimal input variables; however, their predictive performance did not improve with increased measurement frequency (area under the curve, 0.681–0.726). Conclusions More frequent measures of eccentric knee flexor strength and BFlh architecture across a season did not improve the ability to identify which players would sustain an HSI.

    Item Type: Article
    Keywords: Screening; Hamstring Injury; Risk Factors; Multiple Times; Season; Does Not Improve; Identification; Future Injury Risk;
    Academic Unit: Faculty of Science and Engineering > Sports Science and Nutrition
    Item ID: 17936
    Identification Number:
    Depositing User: Jack Hickey
    Date Deposited: 12 Dec 2023 14:49
    Journal or Publication Title: Medicine & Science in Sports & Exercise
    Publisher: Lippincott, Williams & Wilkins
    Refereed: Yes
    Use Licence: This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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