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

Effect of Carbohydrate Consumption on Fatigue and Muscle Damage in Jiu-Jitsu Athletes: A Randomized Clinical Trial

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.

Study Overview

• Status: Completed
• Conditions: Fatigue; Exercise-induced Muscle Damage
• Intervention / Treatment: Dietary supplement: Carbohydrate (maltodextrin); Other: Placebo

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.

• Study Type: Interventional
• Enrollment (Actual): 14
• Phase: Not Applicable

Contacts and Locations

Study Locations

• Brazil
  • Rio Grande Do Sul
    • Pôrto Alegre, Rio Grande Do Sul, Brazil, 90050170
      • Gabriella B. Möller

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 33 years (Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: Male

Description

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).

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Diagnostic
• Allocation: Randomized
• Interventional Model: Crossover Assignment
• Masking: Triple

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: 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.	Dietary supplement: Carbohydrate (maltodextrin); maltodextrin flavored
Placebo Comparator: Placebo; 300 ml of a non-caloric drink. Athletes will drink 100ml before and 100ml in the first and second interval between exercise.	Other: Placebo; non-caloric drink

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
change in upper limbs strength	Kimono Grip Strength Test	Pre-exercise; at 2 intervals during exercise; 24hour and 48hour after exercise

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
change in lower limbs power	Horizontal Countermovement Jump	Pre-exercise; at 2 intervals during exercise; 24hour and 48hour after exercise
change in hand grip strength	Grip Strength Test	Pre-exercise; at 2 intervals during exercise; 24hour and 48hour after exercise
change in creatine kinase	3 ml of blood samples	Pre-exercise; immediatly post-exercise; 24hour and 48hour after exercise
change in glucose	fingertip blood measured by Accutrend® Active glucose-specific reagent tape	Pre-exercise; at 2 intervals during exercise; immediatly post-exercise
change in lactate	fingertip blood measured by Accutrend Plus.	At 2 intervals during exercise; immediatly post-exercise
change in lactate dehydrogenase	3 ml of blood samples	Pre-exercise; immediatly post-exercise; 24hour and 48hour after exercise

Collaborators and Investigators

• Sponsor: Federal University of Health Science of Porto Alegre
• Investigators: Principal Investigator: Claudia D Schneider, PhD, Federal University of Health Science of Porto Alegre

Study record dates

Study Major Dates

• Study Start (Actual): June 26, 2017
• Primary Completion (Actual): December 31, 2017
• Study Completion (Actual): December 31, 2017

Study Registration Dates

• First Submitted: June 26, 2017
• First Submitted That Met QC Criteria: June 28, 2017
• First Posted (Actual): June 29, 2017

Study Record Updates

• Last Update Posted (Actual): January 16, 2019
• Last Update Submitted That Met QC Criteria: January 15, 2019
• Last Verified: January 1, 2019

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Fatigue
• Other Study ID Numbers: 1.873.861

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: Undecided

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No