Caffeine use in a Super Rugby game and its relationship to post-game sleep
© 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 aft...
| Main Authors: | , , , , , , , , |
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| Format: | Journal Article |
| Published: |
Taylor and Francis Group
2018
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| Online Access: | http://hdl.handle.net/20.500.11937/66388 |
| _version_ | 1848761309804363776 |
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| author | Dunican, I. Higgins, C. Jones, M. Clarke, M. Murray, K. Dawson, B. Caldwell, J. Halson, S. Eastwood, Peter |
| author_facet | Dunican, I. Higgins, C. Jones, M. Clarke, M. Murray, K. Dawson, B. Caldwell, J. Halson, S. Eastwood, Peter |
| author_sort | Dunican, I. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 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. |
| first_indexed | 2025-11-14T10:29:38Z |
| format | Journal Article |
| id | curtin-20.500.11937-66388 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:29:38Z |
| publishDate | 2018 |
| publisher | Taylor and Francis Group |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-663882018-04-30T02:48:45Z Caffeine use in a Super Rugby game and its relationship to post-game sleep Dunican, I. Higgins, C. Jones, M. Clarke, M. Murray, K. Dawson, B. Caldwell, J. Halson, S. Eastwood, Peter © 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. 2018 Journal Article http://hdl.handle.net/20.500.11937/66388 10.1080/17461391.2018.1433238 Taylor and Francis Group restricted |
| spellingShingle | Dunican, I. Higgins, C. Jones, M. Clarke, M. Murray, K. Dawson, B. Caldwell, J. Halson, S. Eastwood, Peter Caffeine use in a Super Rugby game and its relationship to post-game sleep |
| title | Caffeine use in a Super Rugby game and its relationship to post-game sleep |
| title_full | Caffeine use in a Super Rugby game and its relationship to post-game sleep |
| title_fullStr | Caffeine use in a Super Rugby game and its relationship to post-game sleep |
| title_full_unstemmed | Caffeine use in a Super Rugby game and its relationship to post-game sleep |
| title_short | Caffeine use in a Super Rugby game and its relationship to post-game sleep |
| title_sort | caffeine use in a super rugby game and its relationship to post-game sleep |
| url | http://hdl.handle.net/20.500.11937/66388 |