The 2016 Reebok CrossFit Games were a grueling five-day, 15-event test to find the fittest man and woman on Earth. "Fittest on Earth: A Decade of Fitness" follows the dramatic story of the top athletes who qualified and competed and offers an inside look at what it takes to be among the world's elite athletes, both in training and on the competition floor. The CrossFit Games challenge competitors to perform intense physical tasks, but the hardest part is sometimes mental. Athletes often learn the details of the events only minutes before they begin, and everyone handles the pressure differently. Which of these fierce competitors will rise to the top and earn the title of Fittest on Earth?

The fittest athletes on Earth take on the CrossFit Games, the ultimate test of fitness to prove that they are the fittest on Earth.

In 2019 the fittest athletes on earth took on the unknown and unknowable during four intense days of competition at the CrossFit Games. "The Fittest " captures all the drama as chiseled athletes descend on Madison, Wisconsin, to face a series of trials. On top of the physical challenges, this year the sport grew from 40 men and women, to over 100 of each. But with this new format came cuts of the field, so for the final half of the weekend, only 10 men and 10 women move on to determine who is the fittest. The best among them enter the pantheon of CrossFit giants and earn the right to call themselves the "Fittest on Earth."