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in athletes. Med Sci Sports Exerc 2003, 35:2013–2022.PubMedCrossRef Florfenicol 32. Santtila M, Kyrolainen H, Hakkinen K: Changes in maximal and explosive strength, electromyography, and muscle thickness of lower and upper extremities induced by combined strength and endurance training in soldiers. J Strength Cond Res 2009, 23:1300–1308.PubMedCrossRef 33. Earp JE, Joseph M, Kraemer WJ, Newton RU, Comstock BA, Fragala MS, Dunn-Lewis C, Solomon-Hill G, Penwell ZR, Powell MD, Volek JS, Denegar CR, Häkkinen K, Maresh CM: Lower-body muscle structure and its role in jump performance during squat, countermovement, and depth drop jumps. J Strength Cond Res 2010, 24:722–729.PubMedCrossRef Competing interests MP and RJ have been named as inventors on pending patents by Chemi Nutra. MP and RJ are independent paid consultants to Chemi Nutra. All other authors declare that they have no competing interests. Authors’ contributions JRH was the primary investigator, Selleck PD-L1 inhibitor supervised all study recruitment and data/specimen analysis. JRH, MP and RJ designed study, JRH and JRS performed the statistical analysis, JRH supervised the manuscript preparation, JRS, DRW and RJ helped drafting the manuscript. DRW, AJW, MSF, GTM, AMG, NSE, WPM and TCS assisted with data collection and data analysis. All authors read and approved the final manuscript.