PubMed 38. Pauole K, Madole K, Garhammer J, Lacourse M, Rozenek R: Reliability and validity of the T-test as a measure of agility, Leg power, and Leg speed in college-aged Men and women. J Strength Cond Res 2000, 14:443–450. 39. Borg G: Simple rating methods for estimation of perceived exertion. In Physical Work and Effort. Edited by: Borg G. New York: Pergamon Press; 1975:39–46. 40. Delextrat A, Cohen D: Physiological testing of basketball players: toward a standard evaluation of anaerobic fitness. J Strength Cond Res 2008, 22:1066–1072.PubMedCrossRef 41. Hickey KC, Quatman CE, Myer GD, Ford KR, Brosky JA, Hewett TE: Methodological

report: dynamic field tests used in an NFL combine setting to identify lower-extremity functional asymmetries. J Strength Cond Res 2009, ��-Nicotinamide datasheet 23:2500–2506.PubMedCentralPubMedCrossRef S3I-201 concentration 42. Glaister M, Howatson G, Pattison JR, McInnes G: The reliability and validity of fatigue measures during multiple-sprint work: an issue revisited. J Strength

Cond Res 2008, 22:1597–1601.PubMedCrossRef 43. Portney LG, Watkins MP: Foundations of Clinical Research: Applications to Practice. 3rd edition. New Jersey: Pearson Education; 2009. 44. Conger SA, Warren GL, Hardy MA, Millard-Stafford ML: Does caffeine added to carbohydrate provide additional ergogenic benefit for endurance? Int J Sport Nutr Exerc Metab 2011, 21:71–84.PubMed 45. Ali A, Williams C, Nicholas CW, Foskett A: The influence of carbohydrate-electrolyte ingestion on soccer skill performance. Med Sci Sports Exerc 2007, 39:1969–1976.PubMedCrossRef 46. Nicholas CW, Tsintzas K, Boobis L, Williams C: Carbohydrate-electrolyte ingestion during intermittent high-intensity running. Med Sci Sports Exerc 1999, 31:1280–1286.PubMedCrossRef 47. Tarnopolsky MA: Caffeine and creatine use in sport. Ann Nutr Metab 2010,57(Suppl 2):1–8.PubMedCrossRef 48. Buchheit M, Cormie P, Abbiss CR, Ahmaidi S, Nosaka KK, Laursen PB: Muscle deoxygenation during repeated sprint running: Effect of active vs. passive recovery. Int J Sports Med 2009, 30:418–425.PubMedCrossRef 49. Davis JM, selleck kinase inhibitor Zhao Z, Stock HS, Mehl KA, Buggy J, Hand

GA: Central nervous system effects of caffeine and adenosine on fatigue. Am J Physiol Regul Integr Comp Physiol 2003, 284:R399–404.PubMed 50. Winnick JJ, Davis JM, Welsh RS, Carmichael MD, Murphy EA, Blackmon JA: Carbohydrate feedings during team sport exercise preserve physical and CNS function. Med Sci Sports Exerc 2005, 37:306–315.PubMedCrossRef 51. Foskett A, Williams C, Boobis L, Tsintzas K: Carbohydrate availability and muscle energy metabolism during intermittent running. Med Sci Sports Exerc 2008, 40:96–103.PubMedCrossRef 52. Jeukendrup AE, Wagenmakers AJ, Stegen JH, Gijsen AP, Brouns F, Saris WH: Carbohydrate ingestion can completely suppress endogenous glucose production during exercise. Am J Physiol 1999, 276:E672–683.PubMed 53.