Effect of Medium Chain Triglycerides Consumption on Running Performance in Long‐Distance Careers Recreational Runners

Abstract

ObjectiveThe purpose of the study was to determine the effect of medium chain triglycerides (MCT) consumption on running performance in long‐distance careers recreational runners.MethodologyA double‐blind placebo controlled crossover study was conducted with 10 recreationally runners. Participants underwent two 21‐kilometers training sessions in random sequence, once with a commercial hydrating sport drink consumption as placebo and once with the same sport drink plus 30g of MCT that were divided and given in four doses of the same amount once before start and the rest at kilometers number 5, 10 and 15. Due to the physical requirements of the tests, a rest period of 45 days was indicated between both evaluations. Anthropometric measurements through ISAK methodology and dietary assessment by 24 hours dietary recalls and food frequency questionnaires were evaluated before both training sessions to analyze that there were no changes in these variables. Participants were encouraged to not change their training sessions or modify their diets.Results50% of participants finished both training sessions. No differences in weight and body composition or dietary intake were observed during the rest period. Gastrointestinal upsets were reported by 66.6% of runners with MCT consumption and there no reports when they consumed placebo. There were no differences in running time when participants consumed MCT, in fact time was a bit higher when compared to placebo (132.6±22.1 vs 128.4±28.1 minutes; P=0.8). No difference were observed when partial times were compared.Conclusion30 g of MCT consumption divided in 4 doses does not improve velocity or running performance during 21‐kilometers training sessions in recreationally runners. MCT consumption was associated with gastrointestinal discomfort, thus possible could affect sport performance.