Six weeks of ß-alanine supplementation did not enhance repeated-sprint ability or technical performances in young elite basketball players.
Nutr Health
; 23(2): 111-118, 2017 Jun.
Article
em En
| MEDLINE
| ID: mdl-28349727
ABSTRACT
Supplementation with ß-alanine plays an important role as a precursor of carnosine, the most effective intramuscular buffer, and has been seen as a potential ergogenic aid, especially for high-intensity modalities such as basketball. Thus, the aim of the present study was to investigate the effects of 6 weeks of ß-alanine supplementation on repeated sprint ability (RSA) and technical performances in young elite Brazilian basketball players. In total, 27 young basketball players (17±1 years) were randomized into a ß-alanine group (Gß - 6.4 g day-1 of ß-alanine) and a placebo group (GP - 6.4 g day-1 of dextrose). Before and after the supplementation period the athletes performed a RSA test composed of ten 30 m sprints with two 180° changes of direction interspaced by 30 s of recovery. During the recovery period (i.e., after the sprints) the athletes performed a countermovement jump (CMJ) and a set of three free throws. After 48 h they performed a Yo-Yo intermittent recovery test level 1 (Yo-Yo IR1). Both groups increased the distance covered in the Yo-Yo IR1 after the supplementation period ( p = 0.001). On the other hand, both groups presented impairment in RSA time-performance (total time, best time, and mean time, p ≤ 0.04), while no significant changes were observed for technical task performances (i.e., CMJ and free throws) ( p ≥ 0.07). No between-group interactions were observed for any variable measured ( p ≥ 0.31). Thus, 6 weeks of ß-alanine supplementation did not improve RSA or technical performances in young elite basketball players.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Corrida
/
Basquetebol
/
Beta-Alanina
/
Suplementos Nutricionais
/
Desempenho Atlético
Tipo de estudo:
Clinical_trials
Limite:
Adolescent
/
Adult
/
Humans
/
Male
País como assunto:
America do sul
/
Brasil
Idioma:
En
Ano de publicação:
2017
Tipo de documento:
Article