Effect of branched chain amino acids intake with different leucine content on total number of repetitions performed during resistance exercise
DOI:
https://doi.org/10.33233/rbfex.v20i2.4289Abstract
Introduction: The supplementation of branched chain amino acids (BCAA) has been widely used and studied during long-term activities, however, it presents a limited number of studies elucidating the effect of this supplementation during resistance training (RT). Objective: To evaluate the influence of BCAA intake, containing different concentrations of leucine, on the total number of repetitions performed during this practice. Methods: Eight participants (4 men and 4 women; age: 20 to 35 years), with experience in RT between 3 and 18 months, performed 10 series with a load corresponding to 80% of 1RM, after ingestion of 0.4 g / kg of BCAA body weight diluted in 250 ml water, with two different leucine concentrations: 4: 1: 1 (3 g leucine, 750 mg isoleucine and 750 mg valine) and 6: 1: 1 (4.5 g leucine, 750 mg isoleucine and 750 mg valine), in addition to the control treatment (CON), characterized by the ingestion of 250 ml water containing a non-caloric dietary compound. Results: It was observed that the total number of repetitions performed in the 10 series was significantly higher for the 6: 1: 1 treatment (70.0 ± 9.5) when compared to the CON treatment (59.8 ± 9.9), different from the 4: 1: 1 treatment (66.8 ± 7.3), which presented a statistically similar result. Conclusion: The concentration of the leucine amino acid, related to the supplemented BCAA dose, is significant to obtain the ergogenic effects promoted by this supplement during the practice of resistance exercise.
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