Creatine Action in Sport Performance: A Systematic Review
Abstract
Creatine is a compound formed by the combination of the amino acids arginine, glycine and methionine and which has been showing positive benefits in physical exercise. From this, the objective was to investigate the action of creatine in the sports performance of strength and endurance. The work is a systematic review prepared with a careful selection of scientific articles, according to the PRISMA model. The articles were searched between August and November 2020, in the PubMed, Science Direct and Web of Science databases. The PICOT method (population, intervention, comparator, outcome and type of study) was used to define the question that led to this review. For the selection and eligibility of studies, inclusion and exclusion criteria were used. In all, 16 articles were selected, of which 6 were elected to compose the review. To ensure the methodological quality of the articles included, a classification tool was used, based on the Cochrane Library. With the studies, it was possible to observe the homogeneity in the samples, diversification in age, selection protocol, duration of studies, type of exercise and diversification in dosage. The researches analyzed showed that the time of use and the dosage of creatine reflected positively on the performance, increasing the percentages of maximum strength. Its use was more effective in amounts less than 5g/kg/day. Intensity exercises with short duration and short intervals between sets showed the best results associated with performance and performance. Further research on the use of creatine should be carried out in order to standardize the amount and time of use of the supplement.
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