Sodium bicarbonate improves swimming performance.
Int J Sports Med
; 29(6): 519-23, 2008 Jun.
Article
em En
| MEDLINE
| ID: mdl-18004687
ABSTRACT
Sodium bicarbonate ingestion has been shown to improve performance in single-bout, high intensity events, probably due to an increase in buffering capacity, but its influence on single-bout swimming performance has not been investigated. The effects of sodium bicarbonate supplementation on 200 m freestyle swimming performance were investigated in elite male competitors. Following a randomised, double blind counterbalanced design, 9 swimmers completed maximal effort swims on 3 separate occasions a control trial (C); after ingestion of sodium bicarbonate (SB NaHCO3 300 mg . kg (-1) body mass); and after ingestion of a placebo (P CaCO3 200 mg . kg (-1) body mass). The SB and P agents were packed in gelatine capsules and ingested 90 - 60 min prior to each 200 m swim. Mean 200 m performance times were significantly faster for SB than C or P (1 52.2 +/- 4.7; 1 53.7 +/- 3.8; 1 54.0 +/- 3.6 min ss; p < 0.05). Base excess, pH and blood bicarbonate were all elevated pre-exercise in the SB compared to C and P trials (p < 0.05). Post-200 m blood lactate concentrations were significantly higher following the SB trial compared with P and C (p < 0.05). It was concluded that SB supplementation can improve 200 m freestyle performance time in elite male competitors, most likely by increasing buffering capacity.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Natação
/
Tolerância ao Exercício
/
Bicarbonato de Sódio
Tipo de estudo:
Clinical_trials
Limite:
Humans
/
Male
Idioma:
En
Revista:
Int J Sports Med
Ano de publicação:
2008
Tipo de documento:
Article
País de afiliação:
Reino Unido