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

Federal University of Health Science of Porto Alegre

Status: Completed

Conditions: Free Radical Oxidation of Tissue; Polyphenol; Muscle Fatigue; Oxidative Stress

Treatments: Dietary Supplement: Grape juice; Dietary Supplement: Maltodextrin

Study type: Interventional

Funder types: Other

Identifiers

NCT03186573

UFCSPAPortoAlegre

Details and patient eligibility

About

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.

Full description

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.

Enrollment: 12 patients

Sex: All

Ages: 15 to 24 years old

Volunteers: Accepts Healthy Volunteers

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..

Trial design

Primary purpose: Prevention

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Double Blind

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12 participants in 3 patient groups, including a placebo group

Control Group

No Intervention group

Description:

The athletes will not receive any drink and will do the simulations of the fight.

Intervention group

Active Comparator group

Description:

(Intervention, grape juice) - athletes will receive 400 ml per day of grape juice (containing 66g of carbohydrates) for 14 days and will do the fight simulations.

Treatment:

Dietary Supplement: Grape juice

Placebo Group

Placebo Comparator group

Description:

(Placebo, grape-flavored maltodextrin carbohydrate) - athletes will receive400ml of drink daily with 66g of maltodextrin for 14 days and will do the fight simulations; The amount of maltodextrin is equal to the amount of carbohydrate present in grape juice.

Treatment:

Dietary Supplement: Maltodextrin