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The relationship between changes in interstitial creatine kinase and game-related impacts in rugby union
(National Winter Sports Research Centre)
2008 (English)In: British Journal of Sports Medicine, ISSN 0306-3674, E-ISSN 1473-0480, Vol. 42, no 3, 198-201 p.Article in journal (Refereed) Published
Abstract [en]

Aim: The primary purpose of this study was to investigate the relationship between the pre-game to post-game changes in creatine kinase concentration ([CK]) and impact-related game statistics in elite rugby union players.

Methods: Twenty-three elite male rugby union players each provided interstitial fluid samples obtained via electrosonophoresis (ESoP) 210 min before and within a maximum time of 30 min after up to five rugby union games. Specific game statistics that were deemed to be important in determining the relationship between impact and [CK] were obtained from AnalyRugby software for each individual player. Regression equations to predict [CK] from game statistics were created using a backwards random-effects maximum likelihood regression.

Results: The [CK] (mean (SD)) from pre-game to post-game was 926.8 (204.2) IU. Game time and time defending were significantly correlated to [CK] in both the forwards and backs. The predicted [CK] (mean (95% confidence limit)) was 1439.8 (204.9) IU for the forwards and 545.3 (78.0) IU for the backs and was significantly correlated with the actual [CK] (r = 0.69 and r = 0.74).

Conclusions: CK increased from pre-game to post-game in a position-specific manner. A large proportion of the [CK] can be explained by physical impact and thus can be predicted using a prescribed number of game statistics. As the [CK] is an indicator of muscle damage, the prediction of [CK] provides a theoretical basis for recovery strategies and adjustment of subsequent training sessions after rugby union games.

Place, publisher, year, edition, pages
2008. Vol. 42, no 3, 198-201 p.
National Category
Sport and Fitness Sciences
Identifiers
URN: urn:nbn:se:miun:diva-16236OAI: oai:DiVA.org:miun-16236DiVA: diva2:527268
Available from: 2012-05-18 Created: 2012-05-18 Last updated: 2012-07-26Bibliographically approved

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Citation style
  • apa
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  • Other style
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  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
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  • asciidoc
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