Fittest on Earth: A Decade of Fitness (2017) 2017, Documentary, United States Fittest on Earth: A Decade of Fitness (2017) Duration: 1H56M Description: Forty of the world’s top athletes battle through 15 events and five grueling days of competition for the title of Fittest on Earth. Who will rise to the top and prove the fittest?.. Trailer ↗ United States 2017 Documentary