Olympics 2021 athletes Simone Biles, John John Florence and Mariah Duran on their skills

Surfer John John Florence and skateboarder Mariah Duran -- and their sports -- will make their Olympic debuts in Tokyo, while four-time Olympic gold medalist Simone Biles is expected to win five more golds. Dylan Coulter, Jeremiah Arias, Parallel Sea

In Tokyo, four-time Olympic gold medalist Simone Biles could become the first woman to land a Yurchenko double pike vault in Olympic competition. Two-time World Surf League champion John John Florence and two-time X Games gold medalist Mariah Duran will lead their sports into the Olympic era as surfing and skateboarding make their five-ring debuts. Ever wonder how these athletes make the toughest skills look easy? We've got you covered here.

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