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Nutrients 2014, 6(2), 637-649; doi:10.3390/nu6020637
Article

Caffeine Reduces Reaction Time and Improves Performance in Simulated-Contest of Taekwondo

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Received: 27 December 2013; in revised form: 24 January 2014 / Accepted: 28 January 2014 / Published: 10 February 2014
(This article belongs to the Special Issue Sport and Performance Nutrition)
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Abstract: The aim of this study was to investigate the effects of caffeine on reaction time during a specific taekwondo task and athletic performance during a simulated taekwondo contest. Ten taekwondo athletes ingested either 5 mg·kg−1 body mass caffeine or placebo and performed two combats (spaced apart by 20 min). The reaction-time test (five kicks “Bandal Tchagui”) was performed immediately prior to the first combat and immediately after the first and second combats. Caffeine improved reaction time (from 0.42 ± 0.05 to 0.37 ± 0.07 s) only prior to the first combat (P = 0.004). During the first combat, break times during the first two rounds were shorter in caffeine ingestion, followed by higher plasma lactate concentrations compared with placebo (P = 0.029 and 0.014, respectively). During the second combat, skipping-time was reduced, and relative attack times and attack/skipping ratio was increased following ingestion of caffeine during the first two rounds (all P < 0.05). Caffeine resulted in no change in combat intensity parameters between the first and second combat (all P > 0.05), but combat intensity was decreased following placebo (all P < 0.05). In conclusion, caffeine reduced reaction time in non-fatigued conditions and delayed fatigue during successive taekwondo combats.
Keywords: martial arts; sport; supplementation; ergogenic aid; time and motion studies martial arts; sport; supplementation; ergogenic aid; time and motion studies
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Santos, V.G.F.; Santos, V.R.F.; Felippe, L.J.C.; Almeida Jr., J.W.; Bertuzzi, R.; Kiss, M.A.P.D.M.; Lima-Silva, A.E. Caffeine Reduces Reaction Time and Improves Performance in Simulated-Contest of Taekwondo. Nutrients 2014, 6, 637-649.

AMA Style

Santos VGF, Santos VRF, Felippe LJC, Almeida Jr. JW, Bertuzzi R, Kiss MAPDM, Lima-Silva AE. Caffeine Reduces Reaction Time and Improves Performance in Simulated-Contest of Taekwondo. Nutrients. 2014; 6(2):637-649.

Chicago/Turabian Style

Santos, Victor G.F.; Santos, Vander R.F.; Felippe, Leandro J.C.; Almeida Jr., Jose W.; Bertuzzi, Rômulo; Kiss, Maria A.P.D.M.; Lima-Silva, Adriano E. 2014. "Caffeine Reduces Reaction Time and Improves Performance in Simulated-Contest of Taekwondo." Nutrients 6, no. 2: 637-649.



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