If you want to learn how the world's best become the best then keep reading. Greg Justice is a best-selling author, speaker, and fitness entrepreneur. Greg owns and directs AYC Health & Fitness, Kansas City’s original personal training center, established in 1986. He has worked with professional football, baseball, and soccer players as well as the non-athletes looking to improve their health and fitness. He has been actively involved in the fitness industry for more than three decades as a club manager, owner, personal fitness trainer and coach, and corporate wellness supervisor.