Effects of grape juice consumption on muscle fatigue and oxidative stress in judo athletes: a randomized clinical trial.

Autor:	Goulart MJVC; Programa de Pós-Graduação em Ciências da Reabilitação, Universidade Federal de Ciências da Saúde de Porto Alegre, Rua Sarmento Leite, 245, 90050-170 Porto Alegre, RS, Brazil., Pisamiglio DS; Curso de Nutrição, Universidade Federal de Ciências da Saúde de Porto Alegre, Rua Sarmento Leite, 245, 90050-170 Porto Alegre, RS, Brazil., MÖller GB; Programa de Pós-Graduação em Ciências da Reabilitação, Universidade Federal de Ciências da Saúde de Porto Alegre, Rua Sarmento Leite, 245, 90050-170 Porto Alegre, RS, Brazil., Dani C; Programa de Pós-Graduação Acadêmico em Biociências e Reabilitação, Centro Universitário Metodista IPA, Rua Coronel Joaquim Pedro Salgado, 80, 90420-060 Porto Alegre, RS, Brazil., Alves FD; Programa de Pós-Graduação em Ciências da Reabilitação, Universidade Federal de Ciências da Saúde de Porto Alegre, Rua Sarmento Leite, 245, 90050-170 Porto Alegre, RS, Brazil.; Centro Universitário Ritter dos Reis/UNIRITTER, Rua Orfanotrófio, 555, 90840-444 Porto Alegre, RS, Brazil., Bock PM; Instituto de Avaliação de Tecnologia em Saúde, Hospital de Clínicas de Porto Alegre, Rua Ramiro Barcelos, 2350, 90035-903 Porto Alegre, RS, Brazil.; Faculdades Integradas de Taquara/FACCAT, Rua Oscar Martins Rangel, 4500, (ERS 115), 95612-150 Taquara, RS, Brazil., Schneider CD; Programa de Pós-Graduação em Ciências da Reabilitação, Universidade Federal de Ciências da Saúde de Porto Alegre, Rua Sarmento Leite, 245, 90050-170 Porto Alegre, RS, Brazil.
Jazyk:	angličtina
Zdroj:	Anais da Academia Brasileira de Ciencias [An Acad Bras Cienc] 2020 Nov 20; Vol. 92 (4), pp. e20191551. Date of Electronic Publication: 2020 Nov 20 (Print Publication: 2020).
DOI:	10.1590/0001-3765202020191551
Abstrakt:	Physiological levels of reactive oxygen species (ROS) are important for intracellular and extracellular redox regulation in signaling and defense processes. Strenuous exercise can also contribute to this imbalance, and the muscle fatigue, evidenced by impaired strength or power generation, can be caused by various reasons, including oxidative stress. Antioxidants can prevent the formation of ROS by intercepting free radicals. Twenty judo athletes were included in this randomized, double-blind clinical trial into grape juice and placebo groups, and they consumed grape juice or placebo daily for 14 days in a crossover model. The outcomes were analyzed before and after combat simulations. The upper limb strength was higher in the grape juice group than in the placebo (p [group] = 0.003). The lipid damage levels were 10% higher in the placebo group (p [interaction] = 0.048). During the pre-exercise, the placebo group showed 19% more DNA damage than the grape juice group. The superoxide dismutase activity was 80% lower in the grape juice group (p [interaction] < 0.001). The consumption of grape juice can improve parameters of oxidative stress by reducing the lipid and DNA damage.
Databáze:	MEDLINE
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