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dc.contributor.authorDunican, I.
dc.contributor.authorHiggins, C.
dc.contributor.authorJones, M.
dc.contributor.authorClarke, M.
dc.contributor.authorMurray, K.
dc.contributor.authorDawson, B.
dc.contributor.authorCaldwell, J.
dc.contributor.authorHalson, S.
dc.contributor.authorEastwood, Peter
dc.identifier.citationDunican, I. and Higgins, C. and Jones, M. and Clarke, M. and Murray, K. and Dawson, B. and Caldwell, J. et al. 2018. Caffeine use in a Super Rugby game and its relationship to post-game sleep. European Journal of Sport Science: pp. 1-11.

© 2018 European College of Sport Science Objective: To examine the relationship between regular game-related caffeine consumption on sleep after an evening Super Rugby game. Methods: Twenty elite rugby union players wore a wrist-activity monitor to measure sleep for three days before, three days after and on the night of an evening Super Rugby game (19:00–21:00). Players ingested caffeine as they would normally (i.e. before and sometimes during a game) and saliva samples were collected before (17:00) and after (21:30) the game for caffeine concentration. Results: Compared to the nights leading up to the game, on the night of the game, players went to bed 3 h later (23:08?±?66 min vs 02:11?±?114 min; p? < ?.001) and had 1:30 hh:mm less sleep (5:54?±?2:59 vs 8:02?±?1:24 hh:mm; p? < ?.05) and four players did not sleep after the game. Post-game caffeine saliva concentrations were greater than pre-game levels in 17 players (Pre-game 0.40 µg/mL vs Post-game 2.77 µg/mL; p? < ?.001). The increase in caffeine saliva concentrations was moderately associated with an increase in sleep latency (p? < ?.05), a decrease in sleep efficiency (p? < ?.05), and a trend for a decrease in sleep duration (p?=?.06) on game night. Conclusion: Caffeine consumption before a Super Rugby game markedly increases post-game saliva caffeine levels. This may contribute to the observed 3.5 h delay in time at sleep onset and the 1.5 h reduction in sleep duration on the night of the game. This study highlights the need for a strategic approach to the use of caffeine within a Super Rugby team considering the potential effect on post-game sleep.

dc.publisherTaylor and Francis Group
dc.titleCaffeine use in a Super Rugby game and its relationship to post-game sleep
dc.typeJournal Article
dcterms.source.titleEuropean Journal of Sport Science
curtin.departmentSchool of Physiotherapy and Exercise Science
curtin.accessStatusFulltext not available

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