Evolução de biomarcadores de estresse oxidativo e relação com a performance competitiva em dois momentos da temporada de treinamento de natação

Deminice, Rafael; Degiovanni, Gabriel Carvalho; Garlipp-Picchi, Monike; Nóbrega, Mariana; Teixeira, Marcelo; Jordão, Alceu Afonso

doi:10.1590/s1517-86922009000500009

Cited by 4 publications

(4 citation statements)

References 26 publications

(42 reference statements)

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“…The fruit intake of the study women was limited to orange intake 3 times/week. This represents a great risk for muscles and tissues in general due to the inadequate intake of antioxidant compounds that must be present in the regular diet, especially of people under high physiological stress, such as athletes during training and competition 28 .…”

Section: Discussionmentioning

confidence: 99%

Nutritional intake and overall diet quality of female soccer players before the competition period

2016

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Objective: To assess the dietary intake and overall diet quality of female soccer players before the competitive games. Methods: This descriptive and cross-sectional study included 21 women aged 20.8±4.5 years from a professional soccer team. Their nutritional status and dietary adequacy during the training period, before competition season, were assessed. Dietary intake was assessed by three 24-hour recalls, one food frequency questionnaire, and the Healthy Eating Index, an overall diet quality index based on food group intake. Results: The athletes have shown proper nutritional status, but a diet deficient in energy due largely to low carbohydrate intake. On the other hand, the intakes of protein, fatty acids, and sodium were above the recommended intakes, even for athletes. Diet quality assessment by the Healthy Eating Index - 2010 resulted in a mean score of 54.6 points of a maximum of 100, indicating a need of improving the overall diet quality. Conclusion: The study found that the dietary patterns of female football players were both quantitatively and qualitatively inappropriate. A nutritional intervention is indicated to improve diet quality, with the inclusion of various foods, such as whole grains, fruits, vegetables, dairy products, and better protein quality, along with a reduction in saturated fats, sodium, and added sugar.

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Section: Discussionmentioning

confidence: 99%

Nutritional intake and overall diet quality of female soccer players before the competition period

2016

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“…Especula-se que um maior período de polimento poderia proporcionar uma maior redução neste marcador de dano muscular. Especialmente, considerando que apesar de evidências mostrarem bons resultados com uma semana de polimento 23,24 , existe um volume maior de estudos atestando duas semanas como o ideal [25][26][27] . A CK é o marcador que tem sido melhor associado com o desgaste tecidual muscular 28 .…”

Section: Discussionunclassified

Estado Físico, Fisiológico E Psicossocial De Atletas Do Tae Kwon Do Na Pré-Competição

et al. 2018

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RESUMOOs aspectos físico, fisiológico e psicossocial no tae kwon do em um período pré-competitivo ainda não foram investigados concomitantemente. Portanto, o objetivo do presente estudo foi analisar os estados físico, fisiológico e psicossocial de atletas de tae kwon do em período pré-competitivo para o campeonato brasileiro. Em um estudo pré-experimental, cinco atletas da seleção masculina de tae kwon do da Paraíba (26±8 anos; 1,76±0,04m) foram submetidos a avaliações antropométricas, dosagens de marcadores de dano muscular, inflamação sistêmica e estresse oxidativo, estados de humor, estresse e recuperação e potência de membros inferiores em dois momentos: 30 (pré) e dois (pós) dias antes do campeonato brasileiro. A análise dos dados foi efetuada pelo teste de Wilcoxon (95% de confiança), cálculo da diferença percentual (Δ) entre os momentos e tamanho do efeito de Cohen (d). Foram verificados efeitos percentuais no dano muscular (Δ= −25,7% na CK; d= 1,10) e atividade oxidativa (Δ= +22,7% na MDA; d= 2,56). Os estados de Conflitos/Pressão e Depressão aumentaram 40% (d= 1,11) e 100% (d= 1,30), respectivamente, e a potência de membros inferiores aumentou 9,05% (d= 4,24). Conclui-se que os atletas aumentaram o estresse psicossocial, no entanto melhoraram a força explosiva de membros inferiores e mantiveram o estado fisiológico esperado para competição. Palavras-chave: Tae kwon do. Atletas. Fisiologia. ABSTRACTIn a pre-competition period, combined analysis of physical, clinical physiological and psychosocial features in taekwondo has not yet been investigated. Therefore, this study examined the physical, physiological and psychosocial states of taekwondo athletes in pre-competition period for the Brazilian championship. In a pre-experimental study, five athletes from the men's Paraíba taekwondo team (26±8 years old; 1.76±0.04m) underwent to anthropometric measures, dosage of muscle damage, systemic inflammation and oxidative stress, evaluation of moods, stress, and recovery, and power of lower limbs in two moments: 30 (pre) and two (post) days before the Brazilian taekwondo championship. Data analysis was performed by Wilcoxon test (95% confidence). Percentage difference (Δ) between the moments and the Cohen's effect size (d) were calculated. Percent effects were observed in muscle damage (Δ= −25.7% in CK, d= 1.1), and antioxidant activity (Δ= 22.7% in MDA, d= 2.56). Conflicts/Pressure and Depression states increase 40% (d= 1.11) and 100% (d= 1.30), respectively. In turn, the power of lower limbs increased by 9.05% (d= 4.24). We conclude that athletes increased Conflict/Pressure and Depression states, however, they increased the power of lower limbs and kept the physiological state expected to compete. Keywords: Tae kwon do. Athletes. Physiology. IntroduçãoOs estados físico, fisiológico e psicológico dos atletas às vésperas de competições são aspectos que influenciam o desempenho físico e competitivo 1,2 . Na modalidade tae kwon do, além das grandes demandas físicas e psicológicas, inerentes ao treinamento de rendim...

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“…Physical exercise induces increased energy demands from tissues and organs in the body which stimulates them to increase their oxygen consumption and thus the formation of toxic chemical species derived from oxygen (ROS) (Deminice et al, 2009;Packer et al, 2008). These toxic chemical species, by reacting with polyunsaturated fatty acids are considered to be the initiators of the process of the lipid peroxidation (LPO) mechanism which changes the permeability of membranes, inducing the formation of hydrophilic pores, one of the major mechanisms of cell damage (Tucci Junior et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Histology and Renal Lipoperoxidation in Rats Exercised on a Treadmill and Submitted to Water Restriction

Lorençoni

Pelai

Godoy³

et al. 2015

Int. J. Morphol.

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SUMMARY:Physical effort stimulates an increase in oxygen consumption in tissues, generating toxic chemical species derived from oxygen (ROS), which are considered the initiators of the lipid peroxidation process (LPO), the major mechanism of cellular injury. As the essential mechanism for maintaining the electrolyte balance depends on an effective kidney function, oxidative stress in this organ can be a key factor in the development and persistence of hypertension. This study aimed to determine the kidney changes induced by a combination of fluid restriction and exercise in rats. The study consisted of 24 male Wistar rats of 90 days of age, divided into four groups, two of which were submitted to water restriction and exercise on a treadmill. Twenty-four hours after the last training session, the animals were euthanized and the left kidney was removed. The upper part of the kidney was used for the histological procedures and the lower part for the quantification of membrane lipoperoxides. Analysis of variance was applied after testing the normality of data, and the comparison between groups was performed using the Bonferroni test, adopting a significance of p<0.05. The restriction had an influence on body weight; kidney weight; proximal tubule maximum diameter; and area, perimeter and diameter of glomeruli, whereas the exercise affected the weight and the minimum diameter of the proximal tubule. According to the TBARS (thiobarbituric acid reactive substances) method, there was a difference between the G1 (control) and G3 (sedentary with water restriction) and between the G2 (exercised with water) and G4 (exercised with water restriction) compared to G1. The treadmill exercise combined with the water restriction promoted structural changes in the glomeruli and promoted oxidative stress, although neither variable corroborated for the potentiating of lipid peroxidation.

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Evolução de biomarcadores de estresse oxidativo e relação com a performance competitiva em dois momentos da temporada de treinamento de natação

Cited by 4 publications

References 26 publications

Nutritional intake and overall diet quality of female soccer players before the competition period

Nutritional intake and overall diet quality of female soccer players before the competition period

Estado Físico, Fisiológico E Psicossocial De Atletas Do Tae Kwon Do Na Pré-Competição

Histology and Renal Lipoperoxidation in Rats Exercised on a Treadmill and Submitted to Water Restriction

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