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

Fatigue Clinical Trial

Official title:

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

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT03203785
• Other study ID #: 1.873.861
• Status: Completed
• Phase: N/A
• Start date: June 26, 2017
• Est. completion date: December 31, 2017

Study information

• Verified date: January 2019
• Source: Federal University of Health Science of Porto Alegre
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial 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.

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.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 14
• Est. completion date: December 31, 2017
• Est. primary completion date: December 31, 2017
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: Male
• Age group: 18 Years to 33 Years

Eligibility

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).

Related Conditions & MeSH terms

• Exercise-induced Muscle Damage
• Fatigue

Intervention

Dietary Supplement:
• Carbohydrate (maltodextrin)
maltodextrin flavored

Other:
• Placebo
non-caloric drink

Locations

Country	Name	City	State
Brazil	Gabriella B. Möller	Pôrto Alegre	Rio Grande Do Sul

Sponsors (1)

Lead Sponsor	Collaborator
Federal University of Health Science of Porto Alegre

Country where clinical trial is conducted

Brazil, 

Outcome

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