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Pre-Competition Carbohydrate Supplementation

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT03522883
Recruitment Status : Unknown
Verified April 2018 by Jaqueline Santos Silva, São Paulo State University.
Recruitment status was:  Recruiting
First Posted : May 11, 2018
Last Update Posted : May 11, 2018
Federal University of Mato Grosso
Information provided by (Responsible Party):
Jaqueline Santos Silva, São Paulo State University

Brief Summary:
The objective of the present study was to evaluate the MPF and the perception of effort of professional jiu jitsu athletes from carbohydrate intake at different moments. Twelve jiu jitsu athletes participated in the study, being randomly divided into three groups of four participants: Control Group (CG); Experimental group 1 (G1), supplementation immediately before the fight and Experimental group 2 (G2), supplementation 30 minutes before the fight. The FPM measurement was performed with the JAMAR® brand analog hydraulic dynamometer in the pre-fight moments and immediately after the fight. The intensity perception of the effort was verified through the adapted Borg scale after the fight. Regarding the findings on muscle strength, there were different outcomes between the groups analyzed.

Condition or disease Intervention/treatment Phase
Feeding Behavior Dietary Supplement: carbohydrate intake prior to exercise Not Applicable

Detailed Description:

The study will be conducted at the "Team Base" training center, located in the western zone of Rio de Janeiro. All procedures were performed under standard conditions (temperature: 21-23 ° C, relative humidity: 40-60%). Participants were previously instructed not to perform vigorous exercise 24 hours prior to data collection and to fast 8 hours prior.

All procedures will be performed in one day. Before the study procedures, participants will be evaluated for anthropometric characteristics using a scale (GAMA ITALY® brand) and a portable stadiometer (Sanny® brand, Personal model). Then, manual palmar grip strength (FPM) will be measured in pre and post fight moments. And, after the fight will also be verified the participants' perception of effort through the adapted Borg scale.

Procedures Fights The struggles (Handori) began respecting the schedules stipulated between the components of the same group. Thus, each fight lasted five minutes, without intervals, where the athletes were instructed to perform dynamic movements, and maintain high movement, aiming to raise the intensity to the maximum during this period.

Carbohydrate Supplementation For the administration of carbohydrate supplementation, the "Advanced Nutrition®" pack containing 30g (1 sachet), energy of 83kcal = 349kJ, carbohydrates 21g, sodium 82mg, vitamin C 4, 2mg and vitamin E 0.90mg.

Palmar Manual Holding Force (FPM) Measurement of the Manual Holding Force (FPM) was performed using the JAMAR® analog hydraulic dynamometer (Asimow Engineering®, USA), with an accuracy of 0.5 kg / f and a maximum capacity of 100 kg / f. Thus, the position suggested by the American Society of Hand Therapists (ASHT) [8] was used, with the participants positioned in a seated position with their hips and knees at 90 ° flexion, shoulder in adduction, elbow flexed at 90 °, wrist and forearm in neutral position. The participant was instructed to perform the greatest possible force and the peak value was subsequently recorded.

Modified Borg Scale Perceived exertion was assessed using the Adapted BORG Scale [7] consisting of an ordinal scale ranging from 0 to 10, where 0 represents none and 10 represents maximum intensity. The following standardized question preceded the application of the scale: "How do you rate the intensity of the exercise performed?" Statistical analysis Mean and standard deviation values were calculated for all variables. The normality of the data was initially analyzed by the Komolgorov-Smirnov procedure. In addition, t-test was used to compare moments and groups. All statistical analysis assumed a significance level of 5%. The analyzes were conducted using the statistical package SPSS (2.0).

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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 12 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double (Participant, Outcomes Assessor)
Primary Purpose: Screening
Official Title: Acute Effects of Previous Carbohydrate Intake on Perceived Exertion and Muscle Strength in Jiu-jitsu Athletes
Actual Study Start Date : April 18, 2018
Estimated Primary Completion Date : June 25, 2018
Estimated Study Completion Date : August 22, 2018

Arm Intervention/treatment
Placebo Comparator: group control
the subjects will not take any type of nutrient intake
Dietary Supplement: carbohydrate intake prior to exercise
Participants will be submitted to carbohydrate supplementation prior to exercise

Experimental: experimental group 1
carbohydrate intake prior to exercise
Dietary Supplement: carbohydrate intake prior to exercise
Participants will be submitted to carbohydrate supplementation prior to exercise

Active Comparator: experimental group 2
carbohydrate intake prior to exercise
Dietary Supplement: carbohydrate intake prior to exercise
Participants will be submitted to carbohydrate supplementation prior to exercise

Primary Outcome Measures :
  1. muscle strength [ Time Frame: five minutes ]
    the muscular force will be measured by means of a manual dynamometer in the dominant upper limb in two moments (pre-fight and post-fight)

Secondary Outcome Measures :
  1. Perception of effort [ Time Frame: five minutes ]
    The perception of effort will be measured through a validated scale (BORG), in the moment after competition. It is a graded scale from 0 to 10 that classifies the individual's perception of effort related to the activity performed.

Information from the National Library of Medicine

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Ages Eligible for Study:   20 Years to 45 Years   (Adult)
Sexes Eligible for Study:   Male
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • healthy young people;
  • Male, aged 20-45 years, professional jiu jitsu athletes;

Exclusion Criteria:

  • musculotendinous lesion or osteoarticular lesion;
  • people who take anabolic steroids

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT03522883

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Contact: Jaqueline Silva 66 990202206 ext + 55
Contact: Jaqueline Silva 66 999202206 ext + 55

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Ary Recruiting
Presidente Prudente, Sao Paulo, Brazil, 19060-900
Contact: Aryane Machado    18981071088   
Sponsors and Collaborators
São Paulo State University
Federal University of Mato Grosso
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Responsible Party: Jaqueline Santos Silva, master in physiotherapy, São Paulo State University Identifier: NCT03522883    
Other Study ID Numbers: SaoPSU_UFMT
First Posted: May 11, 2018    Key Record Dates
Last Update Posted: May 11, 2018
Last Verified: April 2018
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No

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Studies a U.S. FDA-regulated Drug Product: No
Studies a U.S. FDA-regulated Device Product: No
Keywords provided by Jaqueline Santos Silva, São Paulo State University:
Martial Arts