Efeito combinado e independente da cafeína e do bicarbonato de sódio no desempenho em múltiplos testes específicos para o judô

Abstract

Objective: Investigate the isolated and combined effect of caffeine (CAF) and sodium bicarbonate (NaHCO3) on judo performance. Design: Double-blinded, randomized, and counterbalanced design using a Partial Latin Square experimental design. Methods: Ten judokas performed four supplementation protocols (i) NaHCO3, (ii) CAF, (iii) NaHCO3 plus CAF and (iv) placebo followed by three Special Judo Fitness Tests (SJFT) interspaced with 5-min rest. Results: In the first SJFT, the combined supplement (NaHCO3 + CAF) resulted in a higher number of throws compared to placebo (24.4 ± 0.9 and 23.2 ± 1.5 throws respectively, p < 0.05). There was no significant difference between conditions for the second SJFT (p > 0.05). In the third SJFT, NaHCO3 and NaHCO3 + CAF resulted in increased throws when compared to placebo (23.7 ± 1.6, 24.4 ± 1.0, and 22 ± 1.6 throws respectively, p < 0.05). When the total throws performed in the three SJFT were summed, they were higher than placebo only for NaHCO3 + CAF (68.8 ± 4.4 and 72.7 ± 3.1 throws, respectively, p < 0.05). Peak plasma lactate after each SJFT was higher in all experimental conditions compared to placebo (p < 0.05). There was no significant difference in RPE across the conditions (p > 0.05). Conclusions: The results of the current study show that the combined supplementation of caffeine and sodium bicarbonate increases judo performance when compared to placebo.