Decathlon for women?
Rio 2016 gold medallist Nafi Thiam isn't sure about the decathlon replacing the heptathlon, but men's world champ Kevin Mayer is all for it.
Eliud Kipchoge, Kevin Mayer, and Christian Coleman headline IAAF Male Athlete of the Year shortlist
Season 1 - 12 episodes
Two world-class Olympians swap sports with surprising results.