Caffeine improves biochemical and specific performance after judo training: a double-blind crossover study in a real judo training situation

Nutritional ergogenic aids are foods or nutrients that can improve physical performance. Among these foods with ergogenic properties, caffeine has shown that it can increase the fat catabolism, strength, and improve the cognition and time reaction of an athlete, therefore, it is hoped that it can im...

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Published in:	Nutrition & metabolism Vol. 18; no. 1; p. 15
Main Authors:	Carmo, Kelvin Euton Oliveira, Pérez, Diego Ignácio Valenzuela, Valido, Charles Nardelli, Dos Santos, Jymmys Lopes, Miarka, Bianca, Mendes-Netto, Raquel Simões, Leite, Marina Macedo Rodrigues, Antoniêtto, Naiara Ribeiro, Aedo-Muñoz, Esteban Ariel, Brito, Ciro José
Format:	Journal Article
Language:	English
Published:	England BioMed Central Ltd 23-01-2021 BioMed Central BMC
Subjects:	Analysis Athletes Athletic performance Biomarkers Body mass Caffeine Carbohydrates Cognition Cognition & reasoning Creatinine Data collection Dietary supplements Double-blind studies Ergogenic aid Exercise Fat metabolism Fatty acids Heart rate Judo Lactic acid Martial arts Metabolism Nutrients Pain Physical fitness Physiological aspects Placebos Skills Specific task performance Training Uric acid Brazil Chile Specific task performance Fat metabolism Martial arts Ergogenic aid Athletic performance Caffeine
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Summary:	Nutritional ergogenic aids are foods or nutrients that can improve physical performance. Among these foods with ergogenic properties, caffeine has shown that it can increase the fat catabolism, strength, and improve the cognition and time reaction of an athlete, therefore, it is hoped that it can improve the performance of judokas. This study through a double-blind crossover (supplement X placebo) protocol, investigated the effects caffeine supplementation (single capsule containing 5 mg/kg body mass intake 60 min before the session) on biochemical, anthropometrical, physical, subjective and hemodynamic variables measured before, during and after two typical judo trainingcxs sessions (120-min: 40-min of gymnastics; 40-min of specific technics and; 40-min of judo combat). 8 high-level athletes (21.4 ± 2.0 years; 83.6 ± 15.2 kg; 1.8 ± 0.1 m; 17.9 ± 7.0 Fat%) were evaluated before and after each training for body mass, hydration, upper and lower limb power, performance in the special judo fitness test (SJFT), free fatty acids (FFA) in plasma, uric acid, glucose, lactate, heart rate, and pain. In addition, heart rate, FFA in plasma, uric acid, glucose, lactate, rating of perceived exertion and pain were assessed during the training. At 120 min, supplementation resulted in a higher concentration of plasma FFA (1.5 ± 0.5 vs. 1.0 ± 0.3 mmol/L; p = 0.047) and lactate (4.9 ± 1.8 vs. 3.0 ± 1.2 mmol/L; p = 0.047), and a lower concentration of uric acid (5.4 ± 0.9 vs. 7.0 ± 1.5 mg/dL; p = 0.04). Supplementation also resulted in performance maintenance (fatigue index) in the SJFT (Δ0.3 ± 2.0 vs Δ1.7 ± 2.5, for caffeine and placebo respectively, p = 0.046). No adverse effects were observed. Based on the applied dose, intake time, and sample of this study, we can conclude that caffeine produces an ergogenic biochemical effect, and improves performance in judo athletes.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	1743-7075 1743-7075
DOI:	10.1186/s12986-021-00544-5