Introducing SI's 2020 Fittest 50

Video Rating:
TV-G
Video Duration:
58

Once again, SI is revealing its Fittest 50 list, designed to recognize the athletes at the absolute peak of physical fitness. The list takes into account attributes like speed, power and flexibility and cross-sport questions like: How effective would LeBron James be as a football player? Where would Serena Williams finish in a marathon? Welcome to the SI Fittest 50.