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    Transient fatigue is not influenced by ball-in-play time during elite rugby league matches

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    Authors
    Waldron, Mark
    Highton, Jamie M.
    Thomson, Edward
    Twist, Craig
    Affiliation
    University of Chester
    Publication Date
    2017-03-13
    
    Metadata
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    Abstract
    The capacity to sustain high-speed running is important for rugby league players. Transient fatigue, described as a reduction in high-speed running in the 5-min after a peak 5-min period, is a phenomenon observed during rugby league matches. This concept has recently been questioned based on the proposed confounding influence of ball-in-play time during these periods. Therefore, this study examined the changes in high-speed running (> 14 km∙h-1) of elite rugby league players, as well as ball-in-play time, during the peak, subsequent and mean 5-min periods of five competitive matches using 5 Hz GPS devices. The suitability of ball-in-play time as a covariate was also evaluated. The high-speed running and ball-in-play time was different between peak (26.7 ± 5.5 m∙min-1 and 177 ± 37 s) and subsequent (12.1 ± 6.2 m∙min-1 and 147 ± 37 s) 5-min periods (P < 0.05; most likely ↓). However, there was no relationship (r = 0.01 to -0.13; P > 0.05) between ball-in-play time and high-speed running and ball-in-play time was not independent of the match period. This study has reaffirmed the presence of transient fatigue during elite rugby league matches but questioned the influence of ball-in-play time as a confounding factor. These observations have implications for the design of appropriate training practices and informing tactical strategies employed by coaches. Most importantly, any practitioner wishing to measure transient fatigue could follow a similar statistical approach taken herein and, based on the current findings would not need to account for ball-in-play time as a confounding variable.
    Citation
    Waldron, M., Highton, J., Thomson, E., & Twist, C. (2017). Transient fatigue is not influenced by ball-in-play time during elite rugby league matches. Journal of Strength and Conditioning Research, 33(1), 146-151. DOI: 10.1519/JSC.0000000000001899
    Publisher
    Lippincott, Williams & Wilkins
    Journal
    Journal of Strength and Conditioning Research
    URI
    http://hdl.handle.net/10034/620399
    DOI
    10.1519/JSC.0000000000001899
    Additional Links
    http://journals.lww.com/nsca-jscr/pages/default.aspx
    Type
    Article
    Language
    en
    Description
    This document is the Accepted Manuscript version of a published work that appeared in final form in Journal of Strength and Conditioning Research. To access the final edited and published work see http://journals.lww.com/nsca-jscr/pages/default.aspx
    ISSN
    1064-8011
    EISSN
    1533-4287
    ae974a485f413a2113503eed53cd6c53
    10.1519/JSC.0000000000001899
    Scopus Count
    Collections
    Sport and Exercise Sciences

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