The 2016 Reebok CrossFit Games presented a demanding five-day, 15-event challenge designed to identify the world’s fittest man and woman. “Fittest on Earth: A Decade of Fitness” captures the compelling journey of the leading athletes who qualified and participated, providing an insider’s perspective on what it takes to be among the globe’s top-tier athletes, both in preparation and during the competition. The CrossFit Games push participants to complete rigorous physical tasks, but the mental aspect can often be the most challenging. Athletes frequently discover the specifics of the events just moments before they start, and each one copes with the pressure in their own way. Who among these formidable contenders will emerge victorious and claim the title of Fittest on Earth?