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Effects of caffeine and carbohydrate mouth rinses on repeated sprint performance
Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences. United Kingdom Sports Council, London, WC1N 1ST, United Kingdom . (National Winter Sports Research Centre)
School of Sport and Exercise Science, Waikato Institute of Technology, Hamilton, 3200, New Zealand .
School of Sport and Exercise Science, Waikato Institute of Technology, Hamilton, 3200, New Zealand .
Health and Sport Portfolio, College of Engineering, Swansea University, Swansea, SA2 8PP Wales, United Kingdom .
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2013 (English)In: Applied Physiology, Nutrition and Metabolism, ISSN 1715-5312, Vol. 38, no 6, 633-637 p.Article in journal (Refereed) Published
Abstract [en]

Introduction: Our purpose was to examine the effectiveness of carbohydrate and caffeine mouth rinses on enhancing repeated sprint ability. Previously, beneficial effects of a carbohydrate mouth rinse (without ingestion) on endurance performance have been related to changes in brain activity. Caffeine ingestion has also demonstrated positive effects on sprint performance. However, the effects of carbohydrate or caffeine mouth rinses on intermittent sprints have not previously been examined. Methods: Twelve males performed 5 x 6 s sprints interspersed by 24 s of active recovery on a cycle ergometer. Twenty-five ml of either a non-caloric placebo, 6% glucose, or 1.2% caffeine solution was rinsed in the mouth for 5 s prior to each sprint in a double-blinded and balanced, cross-over design. Post-exercise maximal heart rate and perceived exertion were recorded along with power measures. A second experiment compared a combined caffeine-carbohydrate rinse with carbohydrate-only. Results: Compared to the placebo mouth rinse, carbohydrate substantially increased Sprint 1 peak power (22.1 ±19.5 W; ES: 0.81), and both caffeine (26.9 ±26.9 W; ES: 0.71) and carbohydrate (39.1 ±25.8 W; ES: 1.08) improved mean power in Sprint 1. Experiment 2 demonstrated that a combination of caffeine and carbohydrate improved Sprint 1 power production compared to carbohydrate alone (36.0 ±37.3 W; ES: 0.81). Conclusions: Carbohydrate and/or caffeine mouth rinses may rapidly enhance power production which could have benefits for specific short sprint exercise performance. The ability of a mouth rinse intervention to rapidly improve maximal exercise performance in the absence of fatigue suggests a central mechanism.

Place, publisher, year, edition, pages
2013. Vol. 38, no 6, 633-637 p.
Keyword [en]
Cycle sprints, Fatigue, Mouth wash, Power
National Category
Medical and Health Sciences
Identifiers
URN: urn:nbn:se:miun:diva-18260DOI: 10.1139/apnm-2012-0333ISI: 000319741200007Scopus ID: 2-s2.0-84878757503OAI: oai:DiVA.org:miun-18260DiVA: diva2:586898
Available from: 2013-01-13 Created: 2013-01-13 Last updated: 2015-07-01Bibliographically approved

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