Beta-Alanine Supplementation Improved 10-km Running Time Trial in Physically Active Adults
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Data
2018-08-08
Autores
Santana, Jeferson O.
Freitas, Marcelo C. de [UNESP]
Santos, Diana M. dos
Rossi, Fabricio E.
Lira, Fabio S. [UNESP]
Rosa-Neto, Jose C.
Caperuto, Erico C.
Título da Revista
ISSN da Revista
Título de Volume
Editor
Frontiers Media Sa
Resumo
The purpose of this study was to investigate the effects of beta-alanine supplementation on a 10 km running time trial and lactate concentration in physically active adults. Sixteen healthy subjects were divided randomly into two groups: beta-alanine (n = 8) and placebo group (n = 8). The experimental group ingested 5 g/day of beta-alanine plus 1 g of resistant starch, and control group ingested 6 g of resistant starch, both for 23 days. Time to complete a 10-km running time trial and lactate concentration following the test were assessed at baseline and post 23 days. The running training program was performed three times per week on non-consecutive days (day 1: running 7 km; day 2: six sprints of 500 m at maximum speed with 2 min of recovery; day 3: running 12 km). The time to complete a 10-km running time trial decreased significantly only for the beta-alanine group (Pre = 3441 +/- 326.7, Post = 3209 +/- 270.5 s, p < 0.05). When analyzing the delta (Time post minus Time at baseline value) there was a statistically significant difference between the beta-alanine vs placebo group (-168.8 +/- 156.6 vs. -53.60 +/- 78.81 s, p = 0.007), respectively. In addition, the beta-alanine group presented lower blood lactate concentration after the 10-km test (beta-alanine: Pre = 8.45 +/- 1.94 vs. Post = 6.95 +/- 2.44 mmol/L; Placebo: Pre = 8.7 +/- 3.0 vs. Post = 10.8 +/- 2.5 mmol/L, p = 0.03). In conclusion, beta-alanine supplementation improved the 10-km running time trial and reduced lactate concentration in physically active adults.
Descrição
Palavras-chave
sport nutrition, endurance training, performance, supplementation, running exercise
Como citar
Frontiers In Physiology. Lausanne: Frontiers Media Sa, v. 9, 6 p., 2018.