Pasman WJ, VanBaak MA, Jeukendrup AE, et al. The effect of different dosages of caffeine on endurance performance time. Int J Sports Med. 1995;16:225–30.
Graham TE, Spriet LL. Metabolic, catecholamine and exercise performance responses to varying doses of caffeine. J Appl Physiol. 1995;78:867–74.
Spriet LL, MacLean DA, Dyck DJ, et al. Caffeine ingestion and muscle metabolism during prolonged exercise in humans. Am J Physiol. 1992;262:E891–8.
Graham TE, Spriet LL. Performance and metabolic responses to a high caffeine dose during prolonged exercise. J Appl Physiol. 1991;71:2292–8.
Graham TE, Helge JW, MacLean DA, et al. Caffeine ingestion does not alter carbohydrate or fat metabolism in skeletal muscle during exercise. J Physiol. 2000;529(3):837–47.
Graham TE, Rush JWE, van Soeren MH. Caffeine and exercise: metabolism and performance. Can J Appl Physiol. 1994;19:111–38.
Spriet LL. Caffeine. In: Bahrke MS, Yesalis CE, editors. Performance enhancing substances in sport and exercise. Windsor: Human Kinetics; 2003. p. 267–78.
Spriet LL. Caffeine. In: Maughan RJ, ed. The encyclopaedia of sports medicine: an IOC medical commission publication. Sports Nutrition. Vol 19. Oxford: Wiley; 2013. p. 313–23.
Nehlig A, Daval JL, Debry G. Caffeine and the central nervous system: mechanisms of action, biochemical, metabolic, and psychostimulant effects. Brain Res Rev. 1992;17:139–70.
Daly JW. Mechanism of action of caffeine. In: Garatttini S, editor. Caffeine, coffee, and health. New York: Raven Press; 1993. p. 97–150.
Fredholm BB. Adenosine, adenosine receptors and the actions of caffeine. Pharmacol Toxicol. 1995;76:93–101.
Kalmar JM, Cafarelli E. Caffeine: a valuable tool to study central fatigue in humans. Exerc Sports Sci Rev. 2004;32:143–7.
Davis JM, Zhao Z, Stock HS, et al. Central nervous system effects of caffeine and adenosine on fatigue. Am J Physiol. 2003;284:R399–404.
Graham TE, Hibbert E, Sathasivam P. Metabolic and exercise endurance effects of coffee and caffeine ingestion. J Appl Physiol. 1998;85:883–9.
Hodgson AB, Randell RK, Jeukendup AE. The metabolic and performance effects of caffeine compared to coffee during endurance exercise. PLoS One. 2013;8:e59561.
Kamimori GH, Karyekar CS, Otterstetter R, et al. The rate of absorption and relative bioavailability of caffeine administered in chewing gum versus capsules to normal healthy volunteers. Int J Pharm. 2002;234:159–67.
Costill DL, Dalsky GP, Fink WJ. Effects of caffeine on metabolism and exercise performance. Med Sci Sports. 1978;10:155–8.
Ivy JL, Costill DL, Fink WJ, et al. Influence of caffeine and carbohydrate feedings on endurance performance. Med Sci Sports. 1979;11:6–11.
Kovacs EMR, Stegen JHCH, Brouns F. Effect of caffeine drinks on substrate metabolism, caffeine excretion, and performance. J Appl Physiol. 1998;85:709–15.
Cox GR, Desbrow B, Montgomery PG, et al. Effect of different protocols of caffeine intake on metabolism and performance. J Appl Physiol. 2002;93:990–9.
Talanian JL, Spriet LL. Low doses of caffeine late in exercise improve cycling time trial performance. FASEB J. 2007;21:107 (abstract).
Jenkins NT, Trilk JL, Singhal A, et al. Ergogenic effects of low doses of caffeine on cycling performance. Int J Sport Nutr Exerc Metab. 2008;18:328–42.
Desbrow B, Barrett CM, Minahan CL, et al. Caffeine, cycling performance, and exogenous CHO oxidation: a dose-response study. Med Sci Sports Exerc. 2009;41:1744–51.
Irwin C, Desbrow B, Ellis A, et al. Caffeine withdrawal and high-intensity endurance cycling performance. J Sports Sci. 2011;29:509–15.
Desbrow B, Biddulph C, Devlin B, et al. The effects of different doses of caffeine on endurance cycling time trial performance. J Sports Sci. 2012;3:115–20.
Burke LM. Caffeine and sports performance. Appl Physiol Nutr Metab. 2008;33:1319–34.
Ganio MS, Klau JF, Casa DJ, et al. Effect of caffeine on sport-specific endurance performance: a systematic review. J Strength Cond Res. 2009;23:315–24.
Wiles JD, Bird SR, Hopkins J, et al. Effect of caffeinated coffee on running speed, respiratory factors, blood lactate and perceived exertion during 1,500 m treadmill running. Br J Sports Med. 1992;26:116–20.
Van Nieuwenhoven MA, Brouns F, Kovacs EM. The effect of two sports drinks and water on GI complaints and performance during an 18 km run. Int J Sports Med. 2005;26:281–5.
Bridge CA, Jones MA. The effect of caffeine ingestion on 8 km run performance in a field setting. J Sports Sci. 2006;24:433–9.
Schubert MM, Astorino TA, Azevedo JL Jr. The effects of caffeinated “energy shots” on time trial performance. Nutrients. 2013;6:2062–75.
Strecker E, Foster EB, Taylor K, et al. Effects of caffeine ingestion on tennis skill performance and hydration status [abstract]. Med Sci Sports Exerc. 2007;39:S43.
Stevenson EJ, Hayes PR, Allison SJ. The effect of a carbohydrate-caffeine sports drink on simulated golf performance. Appl Physiol Nutr Metab. 2009;34:681–8.
Perez-Lopez A, Salinero JJ, Abian-Vicen J, et al. Caffeinated energy drinks improve volleyball performance in elite female players. Med Sci Sports Exerc. Epub 18 Jul 2014.
Del Coso J, Pereze-Lopez A, Abian-Vican L, et al. Caffeine-containing energy drink enhances physical performance in male volleyball players. Int J Sports Physiol Perform. Epub 19 Mar 2014.
Gant N, Ali A, Foskett A. The influence of caffeine and carbohydrate coingestion on simulated soccer performance. Int J Sports Nutr Exerc Metab. 2010;20:191–7.
Roberts SP, Stokes KA, Trewartha G, et al. Effects of carbohydrate and caffeine ingestion on performance during a rugby union simulation protocol. J Sports Sci. 2010;28:833–42.
Spriet LL. Anaerobic metabolism during exercise. In: Hargreaves M, Spriet LL, editors. Exercise metabolism. 2nd ed. Windsor: Human Kinetics; 2006. p. 7–28.
Parolin ML, Chesley A, Matsos MP, et al. Regulation of skeletal muscle glycogen phosphorylase and PDH during maximal intermittent exercise. Am J Physiol Endocrinol Metab. 1999;277:E890–900.
Astorino TA, Robertson DW. Efficacy of acute caffeine ingestion for short-term high intensity exercise performance: a systematic review. J Strength Cond Res. 2010;24:257–65.
Davis JK, Green JM. Caffeine and anaerobic performance: ergogenic value and mechanisms of action. Sports Med. 2009;39:813–32.
Jacobson BH, Weber MD, Claypool L. Effect of caffeine on maximal strength and power in elite male athletes. Br J Sports Med. 1992;26:276–80.
Woolf K, Bidwell W, Carlson AG. The effect of caffeine as an ergogenic aid in anaerobic exercise. Int J Sport Nutr Exerc Metab. 2008;18:412–29.
Wiles JD, Coleman D, Tegerdine M, et al. The effects of caffeine ingestion on performance time, speed and power during a laboratory-based 1-km cycling time trial. J Sports Sci. 2006;24:1165–71.
Doherty M, Smith P, Hughes M, et al. Caffeine lowers perceptual response and increases power output during high-intensity cycling. J Sports Sci. 2004;22:637–43.
Anselme F, Collomp K, Mercier B, et al. Caffeine increases maximal anaerobic power and blood lactate concentration. Eur J Appl Occup Physiol. 1992;65:188–91.
Collomp K, Ahmaidi S, Chatard JC, et al. Benefits of caffeine ingestion on sprint performance in trained and untrained swimmers. Eur J Appl Occup Physiol. 1992;64:377–80.
Astorino TA, Terzi MN, Roberson DW, et al. Effect of two doses of caffeine on muscular function during isokinetic exercise. Med Sci Sports Exerc. 2010;42:2205–10.
Lieberman HR, Wurtman RJ, Emde GG, et al. The effects of low doses of caffeine on human performance and mood. Psychopharmacology. 1987;92:308–12.
Olson CA, Thornton JA, Adam GE, et al. Effects of adenosine antagonists, quercitin and caffeine, on vigilance and mood. J Clin Pyschopharmacol. 2010;30:573–8.
Brunye TT, Mahoney CR, Lieberman HR, et al. Caffeine modulates attention network function. Brain Cogn. 2010;72:181–8.
Hogervorst E, Riedel WJ, Kovacs E, et al. Caffeine improves cognitive performance after strenuous physical exercise. Int J Sports Med. 1999;20:354–61.
Hogervorst E, Badelow S, Scmitt J, et al. Caffeine improves physical and cognitive performance during exhaustive exercise. Med Sci Sports Exerc. 2008;40:1842–51.
Motl RW, OConnor PJ, Dishman RK. Effect of caffeine on perceptions of leg muscle pain during moderate intensity cycling exercise. J Pain. 2003;4:316–21.
Motl RW, OConnor PJ, Tubandt L, et al. Effect of caffeine on leg muscle pain during cycling exercise among females. Med Sci Sports Exerc. 2006;38:598–604.
Gliottoni RC, Meyers JR, Arngrimsson SA, et al. Effect of caffeine on quadriceps muscle pain during acute cycling exercise in low versus high caffeine consumers. Int J Sport Nutr Exerc Metab. 2009;19:150–61.
Astorino TA, Terzi MN, Roberson DW. Effect of caffeine intake on pain perception during high intensity exercise. Int J Sport Nutr Exerc Metab. 2011;21:27–32.
Ganio MS, Johnson EC, Lopez RM, et al. Caffeine lowers muscle pain during exercise in hot but not cool environments. Physiol Behav. 2011;102:429–35.
Cohen BS, Nelson AG, Prevost MC, et al. Effects of caffeine ingestion on endurance racing in the heat and humidity. Eur J Appl Occup Physiol. 1996;73:358–63.
Roelands B, Buyse L, Pauwels F, et al. No effect of caffeine on exercise performance in high ambient temperature. Eur J Appl Physiol. 2011;111:3089–95.
Ganio MS, Johnson EC, Klau JF, et al. Effect of ambient temperature on caffeine ergogenicity during endurance exercise. Eur J Appl Physiol. 2011;111:1135–46.
Van Nieuwenhoven MA, Brummer RJM, Brouns F. Gastrointestinal function during exercise: comparison of water, sports drink, and sports drink with caffeine. J Appl Physiol. 2000;89:1079–85.
Yeo SE, Jentjens RLPG, Wallis GA, et al. Caffeine increases exogenous carbohydrate oxidation during exercise. J Appl Physiol. 2005;99:844–50.
Hulston CJ, Jeukendrup AE. Substrate metabolism and exercise performance with caffeine and carbohydrate intake. Med Sci Sports Exerc. 2008;40:2096–104.
Andoniou CE, Andrews DM, Degli-Esposti MA. Natural killer cells in viral infection: more than just killers. Immunol Rev. 2006;214:239–50.
Gleeson M. Immune function in sport and exercise. J Appl Physiol. 2007;103:693–9.
Fletcher DK, Bishop NC. Effect of high and low dose of caffeine on antigen-stimulated activation of human natural killer cells after prolonged exercise. Int J Sport Nutr Exerc Metab. 2011;21:155–65.
Syed SA, Kamimori GH, Kelly W, et al. Multiple dose pharmacokinetics of caffeine administered in chewing gum to normal healthy volunteers. Biopharm Drug Dispos. 2005;26:403–9.
Ryan EJ, Kim CH, Muller MD, et al. Low-dose caffeine administered in chewing gum does not enhance cycling to exhaustion. J Strength Cond Res. 2012;26:844–50.
Ryan EJ, Kim CH, Fickes EJ, et al. Caffeine gum and cycling performance: a timing study. J Strength Cond Res. 2013;27:259–64.
Paton CD, Lowe T, Irvine A. Caffeinated chewing gum increases repeated sprint performance and augments increases in testosterone in competitive cyclists. Eur J Appl Physiol. 2010;110:1243–50.
Bellar D, Kamimori G, Judge L. Effects of low-dose caffeine supplementation on early morning performance in the standing shot put throw. Eur J Sports Sci. 2012;12:57–61.
Doering TM, Fell JW, Veveritt MD, et al. The effect of a caffeinated mouth-rinse on endurance cycling time-trial performance. Int J Sport Nutr Exerc Metab. 2014;24:90–7.
Beaven CM, Maulder P, Pooley A, et al. Effects of caffeine and carbohydrate mouth rinses on repeated sprint performance. Appl Physiol Nutr Metab. 2013;38:633–7.