Sodium bicarbonate ingestion increases glycolytic contribution and improves performance during simulated taekwondo combat |
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| Authors: | João Paulo Lopes-Silva Jonatas Ferreira Da Silva Santos Guilherme Giannini Artioli Irineu Loturco Chris Abbiss Emerson Franchini |
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| Institution: | 1. Martial Arts and Combat Sports Research Group, School of Physical and Education and Sport, University of S?o Paulo, S?o?Paulo, Braziljoao_judo@hotmail.comlopesilvajp@hotmail.com;4. Martial Arts and Combat Sports Research Group, School of Physical and Education and Sport, University of S?o Paulo, S?o?Paulo, Brazil;5. Musculoskeletal Physiology Research Group, Sport, Health and Performance Enhancement (SHAPE) Research Centre, School of Science and Technology, Nottingham Trent University, Nottingham, UK;6. NAR-Nucleus of High Performance in Sport, S?o Paulo, Brazil;7. Centre for Exercise and Sport Science Research, School of Medical &8. Health Science, Edith Cowan University, Joondalup, Australia |
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| Abstract: | Purpose: To investigate the effect of sodium bicarbonate (NaHCO3) on performance and estimated energy system contribution during simulated taekwondo combat. Methods: Nine taekwondo athletes completed two experimental sessions separated by at least 48?h. Athletes consumed 300?mg/kg body mass of NaHCO3 or placebo (CaCO3) 90?min before the combat simulation (three rounds of 2 min separated by 1 min passive recovery), in a double-blind, randomized, repeated-measures crossover design. All simulated combat was filmed to quantify the time spent fighting in each round. Lactate concentration La?] and rating of perceived exertion (RPE) were measured before and after each round, whereas heart rate (HR) and the estimated contribution of the oxidative (WOXI), ATP (adenosine triphosphate)-phosphocreatine (PCr) (WPCR), and glycolytic (W La? ]) systems were calculated during the combat simulation. Results: La?] increased significantly after NaHCO3 ingestion, when compared with the placebo condition (+14%, P?=?0.04, d?=?3.70). NaHCO3 ingestion resulted in greater estimated glycolytic energy contribution in the first round when compared with the placebo condition (+31%, P?=?0.01, d?=?3.48). Total attack time was significantly greater after NaHCO3 when compared with placebo (+13%, P?=?0.05, d?=?1.15). WOXI, WPCR, VO2, HR and RPE were not different between conditions (P?>?0.05). Conclusion: NaHCO3 ingestion was able to increase the contribution of glycolytic metabolism and, therefore, improve performance during simulated taekwondo combat. |
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| Keywords: | Alkalosis taekwondo energy system time–motion and sports performance |
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