Kipp, who worked on the study that gave the Vaporflys their 4% name, is pleased by the new regulations as she thinks within a year or two athletes will have a level playing field. In the meantime, she says some brands need to let their athletes run in the Nike Vaporfly "or they are going to be at a disadvantage." She also talks about what it was like to realize in 2016 that Nike had a shoe that was so much better than anyone else that she and her fellow researchers nicknamed it "The Magic." And how she believes the shoes cost Kara Goucher an Olympic spot.
Can Callum Hawkins keep his hot streak going or will the Flagstaff-based Olympic silver medallist Feyisa Lelisa get the win? Who will be the top American? And what does Chris Derrick think of Nike's new shoes Zoom Vaporfly shoes - should they be banned?