Title

Sodium bicarbonate ingestion increases glycolytic contribution and improves performance during simulated taekwondo combat

Document Type

Journal Article

Publisher

Taylor & Francis

Place of Publication

United Kingdom

School

Centre for Exercise and Sport Science Research / School of Medical and Health Sciences

Comments

Originally published as: Lopes-Silva, J. P., Da Silva Santos, J. F., Artioli, G. G., Loturco, I., Abbiss, C., & Franchini, E. (2018). Sodium bicarbonate ingestion increases glycolytic contribution and improves performance during simulated taekwondo combat. European Journal of Sport Science, 18(3), 431-440. Original article available here.

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.

DOI

10.1080/17461391.2018.1424942

Access Rights

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