Consumo de aminoácidos de cadeia ramificada não afeta o desempenho de endurance

Uchida, Masayuki; Bacurau, Aline Villa Nova; Aoki, Marcelo Saldanha; Bacurau, Reury Frank Pereira

doi:10.1590/s1517-86922008000100008

Cited by 10 publications

(4 citation statements)

References 28 publications

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“…For instance, a double-blind controlled randomized study showed that 21 g of BCAA supplementation over a week does not enhance vertical jump performance in professional volleyball players [ 11 ]. According to another study, BCAA supplementation after a treadmill test did not provide any differences in the sensation of fatigue and plasma concentration of glucose, lactate, or ammonia [ 12 ]. In contrast, Gualano et al (2011) demonstrated that BCAA supplementation increases exercise capacity and lipid oxidation [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

The Evaluation of Videos about Branched-Chain Amino Acids Supplements on YouTube™: A Multi-Approach Study

Günalan

Turhan

Çavak

et al. 2022

IJERPH

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Branched-chain amino acids (BCAAs) are one of the most controversial ergogenic aids in terms of effectiveness and safety. This study aimed to evaluate the quality and reliability of BCAA supplements related to English videos on YouTubeä and to synthesize with the sentiment–emotion analysis of comments on videos. The content analysis of the information on videos was evaluated with the use of DISCERN, Journal of American Medical Association (JAMA) benchmark criteria, and Global Quality Score (GQS). In addition, word cloud and sentiment and emotional analysis of comments in videos were performed with the R package. As a result, the mean ± standard error values of DISCERN, JAMA, and GQS scores of all videos were 29.27 ± 1.97, 1.95 ± 0.12, and 2.13 ± 0.17, respectively. It was found that advertisement-free videos have a significantly higher DISCERN and GQS score than advertisement-included videos (p < 0.05). A moderately significant positive correlation was determined between DISCERN score of video content and the positive sentiment of video comments (rs: 0.400, p = 0.002). In conclusion, it was determined that BCAA-related YouTubeä videos have mostly very poor quality in terms of content and that videos with higher quality may receive positive comments from viewers according to the DISCERN instrument.

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Section: Introductionmentioning

confidence: 99%

The Evaluation of Videos about Branched-Chain Amino Acids Supplements on YouTube™: A Multi-Approach Study

Günalan

Turhan

Çavak

et al. 2022

IJERPH

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“…Com o intuito de avaliar o efeito da ingestão do BCAA sobre o exercício de endurance realizado até a exaustão, Uchida et al [25] realizaram um estudo duplo cego e randomizado com 17 soldados brasileiros. Eles foram divididos em 2 grupos, os que consumiram 77 mg/kg de BCAA e os que consumiram 64 g de maltodextrina (placebo) durante os treinos.…”

Section: Tabela I -Valores De Percentual De Gordura (%) De Atletas Fu...unclassified

Suplementação de leucina em jogadores de futebol profissionais da categoria sub 17

Pereira

Lima

Setaro

2017

Rev Bras Fisiol Exerc

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O interesse pela leucina vem crescendo cada vez mais por seu efeito ergogênico na promoção do anabolismo, envolvendo a síntese proteica e a degradação muscular. Por ser um aminoácido essencial, é de suma importância sua ingestão na dieta. A leucina desempenha três papéis importantes no nosso metabolismo: como substrato para a síntese proteica, como substrato energético e como sinalizador metabólico. O objetivo deste estudo foi avaliar o efeito da suplementação com leucina sobre a massa gorda. Participaram do estudo 24 jogadores de futebol profissionais da categoria sub 17 de um clube paulista pertencente a segunda divisão. Foram divididos em 2 grupos: 13 atletas foram suplementados com leucina e 11 com talco farmacêutico (placebo). Foram administradas 2 cápsulas antes do treinamento e 2 cápsulas após o treinamento contendo 0,5g de leucina cada cápsula, durante 25 dias. No momento inicial, foram aferidas e avaliadas as medidas antropométricas: peso, estatura, perímetro braquial, dobra subescapular e dobra tricipital que foram reavaliadas após 12 dias do início da suplementação e após o término dos 25 dias. Ao fim da pesquisa, observou-se que não houve alteração no percentual de gordura dos grupos em questão, com valores de, respectivamente, para os grupos placebo e suplemento de 15,92% ± 3,04; 17,74% ± 3,19. Não foram observados efeitos ergogênicos em relação ao desempenho físico, pois não foram realizados parâmetros de treinamento. Palavras chave: aminoácido, leucina, anabolismo, massa gorda, efeitos ergogênicos.Â

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“…However, some research results show disagreement. In studies of Uchida et al [36] and Van Hall et al [37], the authors sought to analyze if the consumption of BCAA could somehow influence the performance of resistance exercise. They concluded that no significant differences were found in time of exhaustion analyzed, which means that the consumption of BCAA did not affect the performance in tests.…”

Section: Effects On Physical Performance In Endurance Exercisementioning

confidence: 99%

Leucine: Considerations about the Effects of Supplementation

Paza¹

2014

J Nutr Food Sci

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The main objective of this study is the considerations about the Effects of Leucine Supplementation. Leucine is a branched chain amino acids (BCAA), which is characterized by the ability to be formed from a conformation where an R grouping is non-polar aliphatic. It is noticeable a steady increase in the use of nutritional supplements among physically active, justifying the need of studies to verify the possible benefits and risks that they may lead to health of individuals. In this aspect, this study aimed to highlight the main biochemical and functional characteristics of Leucine. In addition to analyze the possible effects of its supplementation in diets for weight loss on physical performance as well as its benefits to human health, with the largest number of studies that addressed the issue, both in humans and in animals. According to the bibliography found, the Leucine supplementation can influence the protein synthesis, thus contributing to the anabolism, in addition to having an important role in regulating glucose homeostasis aiding weight loss process. Leucine appears as an important supplement for health benefits as an adjunct in the treatment of insulin resistance and may assist in gaining muscle mass in the elderly, as well as contributing to recovery from injuries and wounds in the muscle tissue. It is still necessary more research into the potential health benefits in view that many of the articles analyzed were conducted in animals. It is noteworthy that most of the research conducted tests on animals, highlighting the importance of greater academic literature on this topic. Besides, most relevant studies to conclusions about the effect of intake of leucine in physical performance are also needed, as there are still many disagreements over the results of leucine supplementation on this aspect.

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Consumo de aminoácidos de cadeia ramificada não afeta o desempenho de endurance

Cited by 10 publications

References 28 publications

The Evaluation of Videos about Branched-Chain Amino Acids Supplements on YouTube™: A Multi-Approach Study

The Evaluation of Videos about Branched-Chain Amino Acids Supplements on YouTube™: A Multi-Approach Study

Suplementação de leucina em jogadores de futebol profissionais da categoria sub 17

Leucine: Considerations about the Effects of Supplementation

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