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Open AccessArticle

The Performance Effect of Scheduled Carbohydrate and Caffeine Intake during Simulated Team Sport Match-Play

1
Gaelic Sports Research Centre, Department of Science, Tallaght Campus, Technological University Dublin, 24, D24 FKT9 Dublin, Ireland
2
Limerick Institute of Technology, Thurles Campus, V94 EC5T Limerick, Ireland
3
Department of Biomedical Sciences for Health, Università degli Studi di Milano, 20133 Milan, Italy
*
Author to whom correspondence should be addressed.
Nutrients 2020, 12(7), 1926; https://doi.org/10.3390/nu12071926
Received: 25 April 2020 / Revised: 19 June 2020 / Accepted: 24 June 2020 / Published: 29 June 2020
(This article belongs to the Special Issue The Role of Precise and Personalized Nutrition on Athletes)
The aim of the current investigation was to identify the effects of scheduled carbohydrate (CHO) and caffeine (CAF) supplementation on simulated team sport match-play performance. Ten male hurling players completed three hurling match-play simulation protocols (HSP) performed 7 days apart in a double-blind, randomized design. Supplementation included CHO, CHO + CAF, and placebo (PLA). In a randomized order, participants ingested either a 6% CHO solution, a PLA solution of similar taste, or a combined intake of 6% CHO solution + 200 mg CAF capsule. At specific time points (Pre-0 min; half time (HT)-30 min; full time (FT)-60 min), participants completed a repeated sprint protocol (RAST; 12 × 20 m). Physiological [% maximal oxygen uptake (%VO2max), % mean oxygen uptake (%VO2mean), % maximal heart rate (%HRmax), % mean heart rate (%HRmean), respiratory exchange ratio (RER), and blood lactate (BLa)] and performance [(best sprint time (RSAbest), mean sprint time (RSAmean), and rate of perceived exertion (RPE)] variables were monitored throughout each simulation. Non-significant differences were observed between supplement trials (CHO, CHO + CAF, and PLA) for BLa (η2 = 0.001, small), %VO2max2 = 0.001, small), %VO2mean2 = 0.004, small), %HRmax2 = 0.007, small), %HRmean2 = 0.018, small), RER (η2 = 0.007, small), RPE (η2 = 0.007, small), and RSAbest2 = 0.050, small). RSAmean performance significantly improved in CHO + CAF trials compared to PLA, with sprint times significantly improved from Pre to FT also (η2 = 0.135, medium). A significant difference was observed in BLa between time points (Pre, HT, and FT) (η2 = 0.884, large) in % HRmax (η2 = 0.202, medium), %HRmean2 = 0.477, large), and RER (η2 = 0.554, large) across halves and in RPE across time points (η2 = 0.670, large). Our data provide novel data regarding the effects of CHO and CAF supplementation on team sport performance, with co-ingestion of CHO + CAF reducing the decrement in repeated sprint performance compared to PLA. View Full-Text
Keywords: team sports; repeated sprint-ability; ergogenic aids; internal load; aerobic performance team sports; repeated sprint-ability; ergogenic aids; internal load; aerobic performance
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MDPI and ACS Style

Keane, J.; Shovlin, A.; Devenney, S.; Malone, S.; Young, D.; Coratella, G.; Collins, K.; Shortall, M. The Performance Effect of Scheduled Carbohydrate and Caffeine Intake during Simulated Team Sport Match-Play. Nutrients 2020, 12, 1926.

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