Double blind carbohydrate ingestion does not improve exercise duration in warm humid conditions

Journal of Science and Medicine in Sport

Volumn 11, Issue 1, 2008, Pages 72-79

  Nassif, Camila ^a,b   Ferreira, Ana Paula Araujo ^b   Gomes, Aline Regina ^b   Silva, Luciana De Martin ^b   Garcia, Emerson Silami ^b   Marino, Frank E ^a  

^a CHARLES STURT UNIVERSITY   (Australia)

^b FEDERAL UNIVERSITY OF MINAS GERAIS   (Brazil)

Author keywords

Carbohydrate; Exercise; Heat stress; Metabolism; Placebo; Rectal temperature

Indexed keywords

CARBOHYDRATE; GLUCOSE; OXYGEN; PLACEBO;

ARTICLE; ATHLETE; CARBOHYDRATE INTAKE; CLINICAL TRIAL; CONTROLLED STUDY; CROSSOVER PROCEDURE; CYCLING; DIET SUPPLEMENTATION; DOUBLE BLIND PROCEDURE; DRUG POTENCY; EXERCISE; EXHAUSTION; GLUCOSE BLOOD LEVEL; HEAT STRESS; HUMAN; HUMAN EXPERIMENT; HUMIDITY; MALE; MOTIVATION; NORMAL HUMAN; STATISTICAL SIGNIFICANCE;

ADULT; DIETARY CARBOHYDRATES; DOUBLE-BLIND METHOD; EXERCISE; HEAT; HEAT STRESS DISORDERS; HUMANS; HUMIDITY; MALE; PLACEBOS;

EID: 37249043807     PISSN: 14402440     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.jsams.2007.08.015     Document Type: Article

References (26)

1. Coyle E.F., Coggan A.R., Hemmert M.K., et al. Muscle glycogen utilization during prolonged strenuous exercise when fed carbohydrate. J Appl Physiol 61 (1986) 165-172
2. Coggan A.R., and Coyle E.F. Reversal of fatigue during prolonged exercise by carbohydrate infusion or ingestion. J Appl Physiol 63 (1987) 2388-2395
3. Febbraio M.A., Murton P., Selig S.E., et al. Effect of CHO ingestion on exercise metabolism and performance in different ambient temperatures. Med Sci Sports Exerc 28 (1996) 1380-1387
4. Nassis G.P., Williams C., and Chisnall P. Effect of a carbohydrate-electrolyte drink on endurance capacity during prolonged intermittent high intensity running. Br J Sports Med 32 (1998) 248-252
5. Burke L.M., Hawley J.A., Schabort E.J., et al. Carbohydrate loading failed to improve 100-km performance in a placebo-controlled trial. J Appl Physiol 88 (2000) 1284-1290
6. McConell G.K., Canny B.J., Daddo M.C., et al. Effect of carbohydrate ingestion on glucose kinetics and muscle metabolism during intense endurance exercise. J Appl Physiol 89 (2000) 1690-1698
7. Robinson E.M., Graham L.B., Moncada J., et al. Carbohydrate-electrolyte ingestion has no effect on high intensity running performance or blood metabolites. J Exerc Physiol 5 (2002) 49-55
8. Febbraio M.A. Does muscle function and metabolism affect exercise performance in the heat?. Exerc Sport Sci Rev 28 (2000) 171-176
9. Noakes T.D. Physiological models to understand exercise fatigue and the adaptations that predict or enhance athletic performance. Scand J Med Sci Sports 10 (2000) 123-145
10. Clark V.R., Hopkins W.G., Hawley J.A., et al. Placebo effect of carbohydrate feedings during a 40-km cycling time trial. Med Sci Sports Exerc 32 (2000) 1642-1647
11. Nybo L., and Secher N.H. Cerebral perturbations provoked by prolonged exercise. Prog Neurobiol 72 (2004) 223-261
12. Arile G., and Saville W. Anabolic steroids: the physiological effects of placebo. Med Sci Sports Exerc 4 (1972) 124-126
13. Timmons B.W., Newhouse I.J., Thayer R.E., et al. The efficacy of SPORT™ as a dietary supplement on performance and recovery in trained athletes. Can J Appl Physiol 25 (2000) 55-67
14. Carter J., Jeukendrup A.E., Mann C.H., et al. The effect of glucose infusion on glucose kinetics during a 1-h time trial. Med Sci Sports Exerc 36 (2004) 1543-1550
15. Carter J., Jeukendrup A.E., and Jones D.A. The effect of carbohydrate mouth rinse on 1-h cycle time trial performance. Med Sci Sports Exerc 36 (2004) 2107-2111
16. Brozek J., Garnde F., Anderson J.T., et al. Densitometric analysis of body composition: revision of some quantitative assumptions. Ann N Y Acad Sci 110 (1963) 113-140
17. Katch F.I., and McArdle W.D. Prediction of body density from simple anthropometric measurements in college age men and women. Hum Biol 45 (1973) 445-454
18. American College of Sports Medicine. ACSM's guidelines for exercise testing and prescription. 6th ed. (2000), Lippincott Williams & Wilkins, New York
19. ACSM. Position stand: exercise and fluid replacement. Med Sci Sports Exerc 28 (1996) i-iv
20. Borg G.A.V. Psychological bases of physical exertion. Med Sci Sports Exerc 14 (1982) 377-381
21. Ramanathan L.N. A new weighting system for mean surface temperature of the human body. J Appl Physiol 19 (1964) 531-533
22. Portney L.G., and Watkins M.P. Foundations of clinical research: applications to practice. 2nd ed. (2000), Prentice Hall, New Jersey p. 190-91
23. Parkin J.M., Carey M.F., Zhao S., et al. Effects of ambient temperature on human skeletal muscle metabolism during fatiguing submaximal exercise. J Appl Physiol 86 (1999) 902-908
24. Maughan R., Gleeson M., and Greenhaff P.L. Biochemistry of exercise and training (1997), Oxford University Press, New York p. 240
25. Baldwin J., Snow J.R., Gibala M.J., et al. Glycogen availability does not affect the TCA cycle or TAN pools during prolonged, fatiguing exercise. J Appl Physiol 94 (2003) 2181-2187
26. Noakes T.D., Snow R.J., and Febbraio M.A. Linear relationship between the perception of effort and the duration of constant load exercise that remains. J Appl Physiol 96 (2004) 1571-1573