Catch all the action at the 2017 Reebok CrossFit Games on CBS this Saturday, Aug. 19, at 1 p.m. ET.

Watch the best 40 men and 40 women compete in the world's only test of fitness. Defending champions Mat Fraser and Katrin Davidsdottir put their titles on the line against the fittest on the planet. Watch the exciting final event of the competition, and see one champion remain victorious while the other makes way for a new winner.