Cocoa Intake for Health Promotion in Athletes (INDYCA)
|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.|
|ClinicalTrials.gov Identifier: NCT03897114|
Recruitment Status : Active, not recruiting
First Posted : April 1, 2019
Last Update Posted : November 15, 2019
|Condition or disease||Intervention/treatment||Phase|
|Healthy Subjects||Dietary Supplement: Cocoa group Dietary Supplement: Placebo group||Not Applicable|
The objective of this project is to investigate the benefits of daily consumption of cocoa in endurance athletes in:
A) Gastrointestinal problems associated with exercise. B) Reinforcement of the gastrointestinal barrier. C) Parameters of inflammation and oxidative stress. D) Sports performance. E) Body composition
The starting hypothesis of this project is based on the fact that daily cocoa consumption could improve the gastrointestinal symptoms associated with resistance exercise. Cocoa decreases the symptoms associated with splenic hypovolemia and strengthens the gastrointestinal epithelial barrier increasing the presence of Lactobacillus spp. and Bifidobacterium spp. in the intestinal microbiota.
A randomized, blinded, parallel placebo controlled intervention study will be carried out in endurance athletes who train in the sports facilities of the European University of Madrid. The number of male athletes for the study will be 56 (28 in each experimental group), all of them aimed at competition with an age between 18 and 40 years and an aerobic power consumption of oxygen greater than or equal to 55 mL / kg / min). The calculation of the sample size has been made selecting with a significance level alpha = 0.05 and a power (beta) of 0.90 for a 2-tailed analysis, taking into account we want to detect a difference of at least 15% in the improvement of the gastrointestinal symptoms, that the standard detected deviation in the questionnaire to be used, in previous studies, is 1.5 points out of 9 and that the expected proportion of losses is 15%.
Before and after the intervention, the athletes will do a test in which we will measure their maximum aerobic capacity. This will be done in the facilities of Europea University of Madrid where there is available a rolling belt. Also, they will do a second test in which we will measure the time they spend running a kilometer at the maximum speed. Body composition will be evaluated by dual-energy X-ray absorptiometry (DEXA). Blood, urine and feces samples will be required before and after the physical tests. Blood and urine samples will be collected in the morning while the feces samples will be collected the day before. The biological samples will be frozen at -80ºC until analyses.
The intervention will be carried out for 10 weeks. Cocoa or placebo will be provide in a single daily intake of 5 g of cocoa containing 500 mg of flavanols (dose at which a prebiotic effect has been demonstrated) or 5 g of maltodextrin.
|Study Type :||Interventional (Clinical Trial)|
|Estimated Enrollment :||56 participants|
|Intervention Model:||Parallel Assignment|
|Intervention Model Description:||Double blind placebo controlled study|
|Masking:||Double (Participant, Investigator)|
|Masking Description:||Cocoa and maltodextrin (placebo) are provided in identical sachets which are identified just with the letters A and B.|
|Official Title:||Cocoa Intake for the Prevention of Gastrointestinal Problems in Athletes: Effects on Oxidative Stress, Inflammation, Microbiota and Sports Performance|
|Actual Study Start Date :||September 1, 2017|
|Actual Primary Completion Date :||February 20, 2019|
|Estimated Study Completion Date :||December 31, 2020|
Experimental: Cocoa group
The cocoa will be provided in sachets. The intervention will be carried out for 10 weeks. Cocoa is provided in a single daily dose of 5 g, which contains 83 mg of flavonoids per gram of cocoa (dose at which a prebiotic effect has been shown).
Dietary Supplement: Cocoa group
Athletes perform the same training program and they take 5 g of cocoa (83 mg of flavonoids per gram of cocoa) mixed with low-fat milk for 10 weeks.
Placebo Comparator: Placebo group
Maltodextrin will be supplied as a placebo, which will be provided in sachets. Athletes will take 5g of product per day.
Dietary Supplement: Placebo group
The athletes perform the same training program and they take for 10 weeks 5 g maltodextrin mixed with low-fat milk for 10 weeks
- Measurement of fat mass [ Time Frame: Fat mass will be analyzed at the beginning (baseline dose) and after 10 weeks of intervention ]Energy X-ray absorptiometry (DEXA ).
- Measurement of lean mass [ Time Frame: Lean mass will be analyzed at the beginning (baseline dose) and after 10 weeks of intervention ]Energy X-ray absorptiometry (DEXA ).
- Sport performance test. [ Time Frame: Sport performance will be analyzed at the beginning (baseline dose) and after 10 weeks of intervention ]Assessment of maximal aerobic capacity.
- Sport performance test 2. [ Time Frame: Sport performance will be analyzed at the beginning (baseline dose) and after 10 weeks of intervention ]Measurement of the time that the sportsmen spend running one kilometer at the maximum speed.
- Change in eating habits. [ Time Frame: Lifestyle will be analyzed at the beginning (baseline dose) and after 10 weeks of intervention. ]Food Frequency Questionnaire.
- Change in Gut Microbiota [ Time Frame: Gut microbiota will be analyzed at the beginning (basiline dose) and after 10 weeks of intervention. ]Determination of Microbial diversity by 16S rRNA Sequencing.
- Measurement of the parameters of inflammation. [ Time Frame: Plasma cytokines will be analyzed at the beginning and at the end of the 10-week intervention. ]Cytokines will be measured in plasma (IL-6, IL-10, IL-1β).
- Indicators of gastrointestinal barrier. [ Time Frame: Plasmatic LPS will be analyzed at the beginning and at the end of the 10-week intervention. ]Determination of plasmatic lipopolysaccharide (LPS) levels as an indicator of bacterial translocation.
- Modification from baseline of gastrointestinal symptoms at 10 weeks [ Time Frame: The questionnaire for the evaluation of gastrointestinal symptoms will be given to the athletes at the beginning and at the end of the 10-week intervention. ]The evaluation of gastrointestinal symptoms will be carried out through following the questionnaire described by Pfeiffer et al. (2009).
- Change from baseline of oxidative stress parameters . [ Time Frame: Nitric oxide will be analyzed at the beginning and at the end of the 10-week intervention. ]Nitric oxide levels will be measured in plasma and urine.
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 ClinicalTrials.gov identifier (NCT number): NCT03897114
|Jose Ángel García Merino|
|Villaviciosa De Odón, Madrid, Spain, 28670|
|Principal Investigator:||María del Mar Larrosa Pérez, PhD||Universidad Europea de Madrid|