Regardless of environmental temperature, these data should not be interpreted as reason to avoid ingesting carbohydrate

during exercise. Carbohydrate delivery during exercise bouts of >1 hr is well known to increase performance [49–51]. However, a growing body of evidence may also suggest that carbohydrate availability during training bouts can alter the metabolic response and perhaps result in increased reliance on fat stores when carbohydrate availability is low [2, 7, 8, 52]. The concept of a ‘periodized diet’ to control and maximize fuel oxidation and the adaptations to specific blocks of training for both endurance and resistance exercise is an exciting new area of applied sport nutrition research. Acknowledgments The authors wish to thank BMS-907351 purchase the subjects for their investment in time and energy. References 1. Holloszy JO: Biochemical adaptations in muscle. Effects of exercise on mitochondrial oxygen uptake and respiratory enzyme activity in skeletal muscle. J Biol Chem 1967, 242:2278–2282.PubMed 2. Cameron-Smith D, Burke LM, Angus DJ, Tunstall RJ, Cox GR, Bonen A, Hawley JA, Hargreaves M: A short-term, high-fat diet up-regulates lipid metabolism

and gene expression in human skeletal muscle. Am J Clin Nutr 2003, 77:313–318.PubMed 3. Baur JA, Pearson KJ, Price NL, Jamieson HA, Lerin C, Kalra A, Prabhu VV, Allard JS, Lopez-Lluch G, Lewis K, et al.: Resveratrol improves selleck health and survival of mice on a high-calorie diet. Nature 2006, 444:337–342.PubMedCrossRef 4. Davis JM, Murphy EA, Carmichael MD, Davis B: Quercetin increases brain and muscle mitochondrial biogenesis and exercise tolerance. Am J Physiol Regul Integr Comp Physiol 2009, 296:R1071–1077.PubMedCrossRef 5. McConell GK, Lee-Young RS, Chen ZP, Stepto NK, Huynh NN, Stephens TJ, Canny Fenbendazole BJ, Kemp BE: Short-term exercise training in humans reduces AMPK signalling during prolonged exercise independent of muscle glycogen. J Physiol 2005, 568:665–676.PubMedCrossRef 6. Dumke CL, Mark Davis J, Angela Murphy E, Nieman DC, Carmichael MD, Quindry JC, Travis Triplett N, Utter AC, Gross Gowin SJ, Henson DA, et al.: Successive bouts of cycling stimulates

genes associated with mitochondrial biogenesis. Eur J Appl Physiol 2009, 107:419–427.PubMedCrossRef 7. Hansen AK, Fischer CP, Plomgaard P, Andersen JL, Saltin B, Pedersen BK: Skeletal muscle adaptation: training twice every second day vs. training once daily. J Appl Physiol 2005, 98:93–99.PubMedCrossRef 8. Slivka DR, Dumke CL, Hailes WS, Cuddy JS, Ruby BC: Substrate use and biochemical response to a 3,211-km bicycle tour in trained cyclists. Eur J Appl Physiol 112:1621–1630. 9. Azad MA, Kikusato M, Maekawa T, Shirakawa H, Toyomizu M: Metabolic characteristics and oxidative damage to skeletal muscle in broiler chickens exposed to chronic heat stress. Comp Biochem Physiol A Mol Integr Physiol 2010, 155:401–406.PubMedCrossRef 10.