Journal article
Caffeine use in a Super Rugby game and its relationship to post-game sleep
European journal of sport science, Vol.18(4), pp.513-523
2018
PMID: 29431593
Abstract
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.
Details
- Title
- Caffeine use in a Super Rugby game and its relationship to post-game sleep
- Authors/Creators
- Ian C. Dunican - The University of Western AustraliaCharles C. Higgins - Western Force, Floreat, WA, AustraliaMaddison J. Jones - The University of Western AustraliaMichael W. Clarke - Univ Western Australia, Ctr Microscopy Characterisat & Anal, Crawley, WA, AustraliaKevin Murray - The University of Western AustraliaBrian Dawson - The University of Western AustraliaJohn A. Caldwell - Coastal Carolina UniversityShona L. Halson - ACTPeter R. Eastwood - The University of Western Australia
- Publication Details
- European journal of sport science, Vol.18(4), pp.513-523
- Publisher
- Taylor & Francis
- Number of pages
- 11
- Grant note
- Australian Federal Government, through the National Collaborative Research Infrastructure Strategy (NCRIS); Australian Government; Department of Industry, Innovation and Science 513704 / NHMRC; National Health and Medical Research Council (NHMRC) of Australia Western Australian State Government
- Identifiers
- 991005592646407891
- Copyright
- © 2018 European College of Sport Science
- Murdoch Affiliation
- Vice Chancellery
- Language
- English
- Resource Type
- Journal article
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- Collaboration types
- Domestic collaboration
- International collaboration
- Citation topics
- 1 Clinical & Life Sciences
- 1.137 Sleep Science & Circadian Systems
- 1.137.349 Insomnia
- Web Of Science research areas
- Sport Sciences
- ESI research areas
- Clinical Medicine