Effect of Grape Juice Consumption on the Parameters of Oxidative Stress and Muscle Fatigue in Judo Athletes

Federal University of Health Science of Porto Alegre12 enrolled

Overview

This project aims to evaluate if after 14 days of grape juice ingestion there is improvement of the parameters of strength, fatigue and oxidative stress in judo fighters. The study will be a randomized, blind, crossover clinical trial of 20 Judo athletes. Judo wrestling simulations will be performed on 3 different days.

Grape juice has a high concentration of phenolic compounds and is capable of modulating biochemical parameters and oxidative stress. By naturally containing carbohydrates grape juice can help acutely minimize fatigue during exercise as well as long-term oxidative stress parameters in athletes. This project aims to evaluate if after 14 days of grape juice ingestion there is improvement of the parameters of strength, fatigue and oxidative stress in judo fighters. The study will be a randomized, blind, crossover clinical trial of 20 Judo athletes. Judo wrestling simulations will be performed on 3 different days. Each exercise session will consist of four 7-minute bouts, with 14-minute rest between them. The athletes will perform a first fight simulation without ingestion of any beverage (control group 1), and then will be randomized to determine the order of participation in the groups: maltodextrin (group 2 placebo) and grape juice (intervention group 3). Analyzes of oxidative stress; Muscle strength and fatigue; Perceived effort rate; Lactate; Heart rate; Analysis of food consumption and body composition.Two-way ANOVA will be used to evaluate the relation of the intervention and physical exercise, besides parameters of strength and fatigue. The level of significance adopted will be 5% and for the analysis, the SPSS summer 23 statistical program will be used.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

PREVENTION

Masking

DOUBLE

Enrollment

Conditions

Oxidative Stress Muscle Fatigue Polyphenol Free Radical Oxidation of Tissue

Interventions

Grape juiceDIETARY_SUPPLEMENT

400ml diary of grape juice

MaltodextrinDIETARY_SUPPLEMENT

400ml diary of maltodextrin

Eligibility

Sex: ALLMin age: 15 YearsMax age: 24 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: * Judo athletes, federated, who hold state, federal and international competitions of both sexes, aged between 15 and 24 years and any weight category of the sport, except free weight. Exclusion Criteria: * Recent injury (last 3 months) that prevents training or competition; * Food restriction on grape juice; * Being in the phase of fast weight loss in pre competition..

Locations (1)

Cláudia Dornelles Schneider

Porto Alegre, Rio Grande do Sul, Brazil

Outcomes

Primary Outcomes

Oxidative stress In Blood Collection

A disturbance in the prooxidant-antioxidant balance in favor of the former, leading to potential damage.

Time frame: 15 days

Secondary Outcomes

Borg in scale.

Specific to muscle fatigue, a state arrived at through prolonged and strong contraction of a muscle. Studies in athletes during prolonged submaximal exercise have shown that muscle fatigue increases in almost direct proportion to the rate of muscle glycogen depletion. Muscle fatigue in short-term maximal exercise is associated with oxygen lack and an increased level of blood and muscle lactic acid, and an accompanying increase in hydrogen-ion concentration in the exercised muscle.

Time frame: 15 days

Data from ClinicalTrials.gov

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