##Ashtary-Larky D, Bagheri R, Ghanavati M, Asbaghi O, Wong A, Stout JR. Effects of beta-alanine supplementation on body composition: a GRADE-assessed systematic review and meta-analysis. Journal of the International Society of Sports Nutrition. 2022;19(1):196-218. ##Borg GA. Psychophysical bases of perceived exertion. Medicine and science in sports and exercise. 1982;14(5):377-81. ##Chaabène H, Hachana Y, Franchini E, Mkaouer B, Montassar M, Chamari K. Reliability and construct validity of the karate-specific aerobic test (KSAT). Journal of Strength and Conditioning Research. 2012;26(12):3454-60. ##Chen B. Effects of Caffeine Supplementation on Physical Performance and Skill Execution in Volleyball Players: A Systematic Review and Meta-Analysis. [Journal name]. 2025; [Volume]([Issue]): [Pages]. ##de Salazar C, Soria M, Gómez M, Ocaña M, González-García J, de Paz JA. Increased Bioavailability of β-Alanine by a Novel Controlled-Release Formulation in a Randomized, Double-Blind, Crossover Study. Nutrients. 2021;13(10):3463. ##Décombaz J, Beaumont M, Vuichoud J, Bouisset F, Stellingwerff T. Effect of slow-release β-alanine combined with caffeine on endurance and cognitive performance in athletes. European Journal of Sport Science. 2012;12(1):57-65. ##Delleli S, Ouergui I, Messaoudi H, Trabelsi K, Ammar A, Glenn JM, et al. Acute Effects of Caffeine Supplementation on Physical Performance, Physiological Responses, Perceived Exertion, and Technical-Tactical Skills in Combat Sports: A Systematic Review and Meta-Analysis. Nutrients. 2022;14(14): [Pages]. ##Gilsanz L, Lopez-Seoane J, Jimenez SL, Pareja-Galeano H. Effect of β-alanine and sodium bicarbonate co-supplementation on the body’s buffering capacity and sports performance: A systematic review. Critical Reviews in Food Science and Nutrition. 2023;63(21):5080-93. ##Gonçalves LS, Painelli VS, Yamaguchi G, Oliveira LF, Saunders B, da Silva RP, et al. Caffeine does not augment the ergogenic effects of creatine supplementation. Journal of the International Society of Sports Nutrition. 2017;14:29. ##Grgic, J., Grgic, I., Pickering, C., Schoenfeld, B. J., Bishop, D. J., & Pedisic, Z. (2020). Wake up and smell the coffee: caffeine supplementation and exercise performance-an umbrella review of 21 published meta-analyses. British journal of sports medicine, 54(11), 681–688. https://doi.org/10.1136/bjsports-2018-100278##Grgic J, Trexler ET, Lazinica B, Pedisic Z. Effects of caffeine intake on muscle strength and power: a systematic review and meta-analysis. Journal of the International Society of Sports Nutrition. 2018;15(1):11. ##Guest NS, VanDusseldorp TA, Nelson MT, Grgic J, Schoenfeld BJ, Jenkins ND. International Society of Sports Nutrition position stand: caffeine and exercise performance. Journal of the International Society of Sports Nutrition. 2021;18(1):1-28. ##Hobson RM, Saunders B, Ball G, Harris R, Sale C. Effects of β-alanine supplementation on exercise performance: a meta-analysis. Amino acids. 2012;43:25-37. ##Hopkins W, Marshall S, Batterham A, Hanin J. Progressive statistics for studies in sports medicine and exercise science. Medicine+ Science in Sports+ Exercise. 2009;41(1):3. ##Howe ST, Bellinger PM, Driller MW, Shing CM, Fell JW. The effect of beta-alanine supplementation on isokinetic force and cycling performance in highly trained cyclists. International journal of sport nutrition and exercise metabolism. 2013;23(6):562-70. ##Jayawardena R, Weerasinghe K, Sooriyaarachchi P, Hills AP. Effect of the beta-alanine supplementation in sports: an umbrella review of systematic reviews and meta-analyses. Medicina dello Sport. 2023;76(2):260-71. ##Lara B, Castillo MJ, García MC, López CM. Caffeine-containing energy drink improves physical performance in female soccer players. Amino Acids. 2014;46(5):1385-92. ##Markovic G, Dizdar D, Jukic I, Cardinale M. Reliability and factorial validity of squat and countermovement jump tests. The Journal of Strength & Conditioning Research. 2004;18(3):551-5. ##Maughan RJ, Burke LM, Dvorak J, Larson-Meyer DE, Peeling P, Phillips SM. IOC consensus statement: Dietary supplements and the high-performance athlete. British Journal of Sports Medicine. 2018;52(7):439-55. ##Peeling P, Castell LM, Derave W, de Hon O, Burke LM. Sports foods and dietary supplements for optimal function and performance enhancement in track-and-field athletes. International journal of sport nutrition and exercise metabolism. 2019;29(2):198-209. ##Pyne DB, Boston T, Martin DT, Logan A. Evaluation of the Lactate Pro blood lactate analyser. European journal of applied physiology. 2000;82(1):112-6. ##Saunders B, Elliott-Sale K, Artioli GG, Swinton PA, Dolan E, Roschel H, et al. β-alanine supplementation to improve exercise capacity and performance: a systematic review and meta-analysis. British journal of sports medicine. 2017;51(8):658-69. ##Trexler ET, Smith-Ryan AE, Stout JR, Hoffman JR. International Society of Sports Nutrition position stand: Beta-Alanine. Journal of the International Society of Sports Nutrition. 2015;12:30. ##Wang Z, Chen Z, Zhou H, Wang L, Li X, Lv Y. Effects of Caffeine Intake on Endurance Running Performance: A Meta-Analysis. Nutrients. 2022;14(12):2537. ##Wu W, Chen Z, Zhou H, Wang L, Li X, Lv Y, et al. Effects of Acute Ingestion of Caffeine Capsules on Muscle Strength and Muscle Endurance: A Systematic Review and Meta-Analysis. Nutrients. 2024;16(8):1146. ##
)