Renata Mamus
M. Gisele Santos
Universidade Federal do Paraná, Curitiba, Brasil.
RESUMO
A proposta do presente estudo foi investigar os efeitos bioquímicos da suplementação de carboidratos em uma competição simulada de short duathlon terrestre. A amostra foi constituída de quatorze duatletas, aos quais foram dados suplementos de uma bebida com carboidrato em uma solução a 6% de maltodextrina (g1), placebo (g2) e solução a 6% de glicose (g3), em três momentos distintos da competição simulada: 30 minutos antes da prova (500ml), a cada 15 minutos durante essa competição (200ml) e imediatamente após o término desta (300ml). Amostras de sangue foram coletadas em dois momentos - antes e imediatamente após o final da competição - para análise da glicemia, lactato, insulina e cortisol. Verificaram-se diferenças significativas, em relação aos níveis de glicemia entre g1 e g2, na fase pós-competição. Quando analisado o lactato, também se verificou uma diferença significativa em g1 e g2 na fase durante a competição. Da mesma forma, foram observadas diferenças significativas nas concentrações de cortisol durante a competição (g1) e pós-competição (g2). A conclusão desse estudo, baseada nos dados obtidos das amostras sanguíneas, foi que a suplementação de maltodextrina fornece indicativos bioquímicos que favorecem sua utilização em competições como o short duathlon terrestre.
Palavras-chave: carboidratos, competição, glicose, lactato, insulina, cortisol.
]]>ABSTRACT
Biochemical Effects of Carbohydrates Supplementation in a Simulated Short Land Duathlon Competition
This study aimed to investigate the biochemical effects of carbohydrates supplementation in a simulated short land duathlon competition. Sample size consisted of 14 athletes that ingested supplements of a 6% maltodextrin solution (G1), placebo (G2), and a 6% glucose solution (G3), in three different moments of the simulated competition: 30 min before de competition (500ml), every 15 min during the competition (200ml), and immediately after the end of the competition (300ml). Blood sampling was obtained during two stages of the competition - before and immediately after the end - to blood glucose, lactate, insulin and cortisol analyses. We found significant differences at glucose concentrations between G1 and G2 after competition. When lactate concentrations were analysed, it was also found a significant difference in G1 and G2 during the competition, as well, in the cortisol concentrations during the competition (G1) and after competition (G2). We conclude that the maltodextrin supplementation provides biochemical evidence that favors its ingestion in simulated short land duathlon competition.
Key Words: carbohydrates, competition, glucose, lactate, insulin, cortisol.
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CORRESPONDÊNCIA
Maria Gisele dos Santos
Rua Brigadeiro Franco, 1909, Apto 903
]]> 80420 – 200 Curitiba, PRBRASIL
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