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Revista Portuguesa de Ciências do Desporto

versão impressa ISSN 1645-0523

Rev. Port. Cien. Desp. v.6 n.1 Porto jan. 2006

 

Efeitos bioquímicos da suplementação de carboidratos após uma competição simulada de Short Duathlon Terrestre.

 

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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REFERÊNCIAS BIBLIOGRÁFICAS

1. Burke L.M., Collier G.R., Hargreaves M. (1993) Muscle glycogen storage after prolonged exercise: effect of the glycemic index of carbohydrates feedings. J Appl Physiol 75: 1019-1023.        [ Links ]

2. Grandjean A.C. (1997) Diets of elite athletes: has the discipline of sports nutrition made in impact? Int J Sport Nutr 127: 874S.

3. Bacurau R.F. (2001). Nutrição e Suplementação Esportiva. 2ª ed., São Paulo: Phorte Editora.

4. Correia M.I.T.D. (1996). Nutrição, Esporte e Saúde. Belo Horizonte: Health.

5. Levenhagen D.K., Gresham J.D., Carlson M.G., Maron D.J. (1969) Post-exercise nutrient intake timing in humans is critical to recovery of leg glucose and protein homeostasis. Am J Physiol Endocrinol Metab 280: E982-E993.

6. Ivy J.L., Katz A.L., Cutler C.L., Sherman W.M., Coyle, E.F. (1988). Muscle glycogen synthesis after exercise: effect of time of carbohydrate ingestion. J Appl Physiol 64: 1480-1485.

7. Doyle J.A., Sherman W.M., Strauss R.L (1993). Effects of eccentric and concentric exercise on muscle glycogen replenishment. J Appl Physiol 74: 1848-1855.

8. Bloom P.C.S, Hostmark A.T., Vaage O., Kardel K.R., Maehlum S. (1987). Effect of different post-exercise sugar diets on the rate of muscle glycogen synthesis. Med Sci Sports Exerc 19: 491-496.

9. Piehl A.K., Soderlund K., Hultman E. (2000). Muscle glycogen resynthesis rate in humans after supplementation of drinks containing carbohydrates with low and high molecular masses. Eur J Appl Physiol 81: 346-35.

10. Van Loon L.J.C, Saris W.H.S, Kruijshoop M., Wagenmakers A.J.M (2000). Maximizing post-exercise muscle glycogen synthesis: carbohydrate supplementation and the application of amino acid and protein hydrolysate mixtures. Am J Clin Nutr 72: 106-111.

11. Ivy J.L. (1998). Glycogen resynthesis after exercise: effect of carbohydrate intake. Int J Sports Med 19, Suppl: 142-146.

12. Hultman E. (1999). Physiological role of muscle glycogen in man, with special reference to exercise. Circulation Research 20-21 (suppl. I): I99-I114.

13. Nelson D.L., Cox M.M. (2000). Lehninger Principles of Biochemistry. 3ª ed.. New York: Worth.

14. Wolinsky I., Hickson J.J.F. (1996). Nutrição no exercício e no esporte. 2ª ed.. São Paulo: Roca.

15. Jacobs K.A, Sherman W.M. (1999). The efficacy of carbohydrate supplementation and chronic high-carbohydrate diets for improving endurance performance. Int J Sport Nutr 9(1): 92-115.

16. Mcardle W.D., Katch F.I., Katch V.L. (2003). Fisiologia do Exercício – Energia, Nutrição e Desempenho Humano. 5 ed. Rio de Janeiro: Guanabara Koogan.

17. Wilmore J.H., Costill D.L. (2001). Fisiologia do sporte e do Exercício. São Paulo: Manole.

18. American College of Sport Medicine (2000). ACSM’s guidelines for exercise testing and prescription. 6. ed.Philadelphia: Lippincott Williams & Wilkins.

20. Coyle E.F., Coogan A.R., Hemmert M.K., Ivy J.L. (1986) Muscle glycogen utilization during prolonged strenuous exercise when fed carbohydrate. J Appl Physiol 61: 165-172.

21. Febbraio M.A., Chiu A., Angus D.J., Arkinstall M.J., Hawley J.A. (2000). Effects of carbohydrate ingestion before and during exercise on glucose kinetics and performance. J Appl Physiol 89: 2220-2226.

22. Nieman D.C.S.L., Nehlsen-Cannarella L., Fagoaga O.R., Henson D.A., Utter A., Davis J.M., Williams F., Butterworth D.E. (2003). Influence of mode and carbohydrate on the cytokine response to heavy exertion. Med Sci Sports Exerc 30: 671-678.

23. Andrews J.L, Sedlock D.A., Flynn M.G., Navalta J.W. (2003). Carbohydrate loading and supplementation in endurance-trained women runners. J Appl Physiol 95: 584-590.

24. Anslie P.N., Campbell I.T., Frayn K.N., Humphreys S.M.(2003). Physiological, metabolic, and performance implications of a prolonged hill walk: influence of energy intake. J Appl Physiol 94: 1075-1083.

25. Borsheim E, Cree G., Tipton K.D., Elliott T.A., Aarsland A., Wolfe, R. (2003). Effect of carbohydrate intake on net muscle protein synthesis during recovery from resistance exercise. J Appl Physiol 96: 674–678.

26. Volek J. S. (2004). Influence of Nutrition on Responses to Resistance Training. Med Sci Sports Exerc 36 (4): 689–698.

27. Widrick J.J., Costill D.L., Fink W.J., Hickey M.S. (1993). Carbohydrate feedings and exercise performance: effect of initial muscle glycogen concentration. J Appl Physiol 74(6): 2998-3005.

28. Bowtell J.L., Gelly K., Jackman M.L., Patel A. (2000) Effect of different carbohydrate drinks on whole body carbohydrate storage after exhaustive exercise. J Appl Physiol 88: 1529-1536.

29. Angus D.J., Febbraio M.A., Lasini D., Hargreaves M. (2001). Effect of carbohydrate ingestion on glucose kinetics during exercise in the heat. J Appl Physiol 90: 601-605.

30. Koch A.J., Potteiger J.A., Chan M.A., Benedict S.H., Frey B. (2001) Minimal influence of CHO ingestion on the immune responses following acute resistance exercise. Int J Sport Nutr 11(2).

31. Grenn K.J., Croaker S.J., Rowbottom D.G. (2003). Carbohydrate supplementation and exercise induced changes in T-lymphocyte function. J Appl Physiol 95: 1216–1223.

32. Anderson G.H., Catherine N.L.A., Woodend D.M., Wolever T.M.S. (2002). Inverse association between the effect of carbohydrate on blood glucose and subsequente short-term food intake in young men. Am J Clin Nutr 76(50): 1023-1030.

33. Coogan A.R., Coyle E.F. (1987). Reversal of fatigue during prolonged exercise by carbohydrate infusion or ingestion. J Appl Physiol 63(6): 2388-2395.

34. MacLaren D.P.M., Close G.L. (2000). Effect of carbohydrate supplementation on simulated exercise of rugby league referees. Ergonomics 43(10): 1528-1537.

35. Costill D.L., Coyle E., Dalsky G., Evans W., Fink W.J., Hoopes, D. (1977). Effects of elevated plasma FFA and insulin on muscle glycogen usage during exercise. J Appl Physiol 43: 695.

36. Ivy J.L., Goforth H.W., Damon B.M. (2002). Early post-exercise muscle glycogen recovery is enhanced with a carbohydrate-protein supplement. J Appl Physiol 93: 1337-1344.

37. Davis J.M., Brown A.S. (2002). Carbohydrates, Hormones and Endurance Performance. Sports Science Exchange 14 (1): 1-4.

38. Volek J.S. (2004). Influence of Nutrition on Responses to Resistance Training. Med Sci Sports Exerc 36 (4): 689–696.

39. Garret W.E., Kirkendall D.T. (2000). Exercise and Sport Science. Philadelphia: Lippincott Williams & Wilkins.

40. Walker J.L., Heigenhauser G.J.F., Hultman E., Spriet L.L. (2000). Dietary carbohydrate, muscle glycogen content, and endurance performance in well-trained women. J Appl Physiol 88: 2151-2158.

41. Lancha Jr A.H. (2002). Nutrição e metabolismo aplicados à atividade motora. São Paulo: Atheneu.

42. Fairchild T.J., Fletcher S., Steele P., Goodman C.(2003). Rapid carbohydrate loading after a short bout of near maximal-intensity exercise. Med Sci Sports Exerc 34:980-986.

43. Utter A.C., Kang J., Robertson R.J., Nieman D.C. (2004). Effect of carbohydrate ingestion on ratings of perceived exertion during a marathon. Med Sci Sports Exerc 34(11): 1779-1784.

44. Smilios I., Pilianidis T., Karamouzis M., Tokmakidis P. (2003). Hormonal responses after various resistance exercise protocols. Med Sci Sports Exerc 35(4): 644-654.

 

 

CORRESPONDÊNCIA

Maria Gisele dos Santos

Rua Brigadeiro Franco, 1909, Apto 903

80420 – 200 Curitiba, PR

BRASIL

mariagisele@yahoo.com