Effect of carbohydrate supplementation on strength parameters during a Brazilian Jiu-Jitsu simulated tournament
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ORIGINAL ARTICLE
Effect of carbohydrate supplementation on strength parameters during a Brazilian Jiu‑Jitsu simulated tournament Gabriella Berwig Möller1,3 · Monique Teixeira Censi1 · Maria Júlia Vieira da Cunha Goulart1,3 · Ramiro Barcos Nunes2,3 · Claudia Dornelles Schneider1,3 Received: 27 March 2020 / Accepted: 17 June 2020 © Springer-Verlag Italia S.r.l., part of Springer Nature 2020
Abstract Purpose This study aimed to analyze the effects of carbohydrate supplementation on strength parameters during a Brazilian Jiu-Jitsu (BJJ) simulated tournament. Methods Fourteen male BJJ amateurs athletes took part in a simulated tournament (3 × 8 min matches, 10-min rest), in a randomized double-blind, placebo-controlled, crossover trial. In two different sessions (7-day washout), BJJ athletes ingested 30 g of maltodextrin (CARB) or placebo (PLA). Were evaluated: maximal isometric handgrip strength (MIH), dynamic strength endurance [Kimono grip strength test dynamic (KGSTD)], muscular power [horizontal countermovement jump, (HCMJ)], ratings of perceived exertion (RPE), and lactate concentration. Results There was an interaction effect on MIH strength (p = 0.029 in right hand). MIH did not change during the tournament simulation in the CARB group, but decreased in the PLA group in the right-hand post-match. An interaction effect in KGSTD was observed (p = 0.006). Both groups had a decrease in KGSTD performance over the match; however, in the second interval, the CARB group showed higher strength than PLA. There was an interaction effect on HCMJ (p = 0.003). HCMJ increased during the tournament in the both groups. Lactate level and RPE indicated that exercise was intense and similar between the groups. Conclusion Carbohydrate supplementation provides a mild improve in the BJJ athlete’s strength during a simulated tournament. Clinical trials NCT03203785. Keywords Martial arts · Muscle strength · Athletic performance · Food supplementation
Introduction Brazilian Jiu-Jitsu (BJJ) is a combat sport based in grappling, sweeps, takedowns, chokeholds, and joint locks [1], which has greatly increased the number of practitioners, both amateurs and professionals. To execute these movements efficiently, BJJ athletes require strength, speed, and * Gabriella Berwig Möller [email protected] 1
Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre, Brazil
2
Instituto Federal de Educação, Ciência e Tecnologia Sul-Rio-Grandense (IFSul), Gravataí, Brazil
3
Graduate Program of Rehabilitation Sciences, Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Sarmento Leite Street 245, Porto Alegre, Brazil
power [2]. This martial art can be defined as an intermittent high-intensity sport, with some periods of low intensity (effort:pause ratio 6:1) [3]. As a result, it requires a complex interaction between the energy systems of the athlete. While the primary energy system activated in BJJ and other martial arts, such as Judo, is the aerobic system, these sports also require m
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