Effect of Carbohydrate Consumption on Fatigue and Muscle Damage in Jiu-Jitsu Athletes

NCT ID: NCT03203785

Last Updated: 2019-01-16

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: NA
• Total Enrollment: 14 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2017-06-26
• Study Completion Date: 2017-12-31

Brief Summary

The study is a randomized, double-blinded, placebo-controlled trial that will include the participation of 14 Jiu-Jitsu athletes between 18 and 33 years. The aim of the study is to evaluate the effects of carbohydrate consumption on fatigue and exercise-induced muscle damage in Jiu-Jitsu athletes.

Detailed Description

Brazilian Jiu-Jitsu (BJJ) is a sport characterized by intermittent high-intensity efforts separated by periods of low intensity. Muscular strength is considered one of the most important physical components to be developed, especially in the upper limbs through dynamic and static actions. The activities of high intensity (relation effort-pause) carried out by the upper and lower limbs during BJJ can induce muscle fatigue. In order to minimize the glycogen depletion and to guarantee the availability of energy substrate to the athlete during the physical exercise, the carbohydrate intake before moderate intensity exercises should be between 5-7 g / kg of weight / day. The intervention group will receive a 30g maltodextrin beverage and the placebo group a non-carbohydrate drink. There will be 3 combat simulations of 8 min each, with intervals of 10 min between fights. Athletes will be instructed to remain with their usual intake during the study. The outcomes will be: manual grip strength (dynamometer), upper limb strength (KGST), lower limb strength (vertical jump), subjective exertion perception (Borg scale), pain perception (Nilsson scale), blood markers of muscle damage (CK and LDH), lactate, and glycemia.

Conditions

Fatigue; Exercise-induced Muscle Damage

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: CROSSOVER
• Primary Study Purpose: DIAGNOSTIC
• Blinding Strategy: TRIPLE

Study Groups

Carbohydrate

30g of carbohydrate (maltodextrin) diluted in 300ml of water. Athletes will drink 100ml before and 100ml in the first and second interval between exercise.

Group Type: EXPERIMENTAL

Carbohydrate (maltodextrin)

Intervention Type: DIETARY_SUPPLEMENT

maltodextrin flavored

Placebo

300 ml of a non-caloric drink. Athletes will drink 100ml before and 100ml in the first and second interval between exercise.

Group Type: PLACEBO_COMPARATOR

Placebo

Intervention Type: OTHER

non-caloric drink

Interventions

Carbohydrate (maltodextrin)

maltodextrin flavored

Intervention Type: DIETARY_SUPPLEMENT

Placebo

non-caloric drink

Intervention Type: OTHER

Eligibility Criteria

Inclusion Criteria

• Compete in the categories of weight between 70kg and 88,3kg (weight classification from light to medium heavy, belonging to the bands purple to brown).
• Age between 18 and 33 years.
• Be training at least three times a week, minimum of 1,5 hours per day, for at least 3 consecutive months.
• Have not used anabolic steroids in the last 6 months during the study period.
• Do not use any type of dietary supplement in the last 3 months.
• Self-declared healthy individuals.

Exclusion Criteria

• Recent muscle injury (within the last 3 months) that compromises and / or impedes the performance of the exercise requested in the study.
• Be in a time of rapid weight loss (pre-competition).

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 33 Years
• Eligible Sex: MALE
• Accepts Healthy Volunteers: Yes

Sponsors

Federal University of Health Science of Porto Alegre

OTHER

Sponsor Role: lead

Responsible Party

Cláudia Dornelles Schneider

Professor

Responsibility Role: PRINCIPAL_INVESTIGATOR

Principal Investigators

Claudia D Schneider, PhD

Role: PRINCIPAL_INVESTIGATOR

Federal University of Health Science of Porto Alegre

Locations

Gabriella B. Möller

Pôrto Alegre, Rio Grande do Sul, Brazil

Countries

Brazil

Other Identifiers

1.873.861

Identifier Type: -

Identifier Source: org_study_id