This Rio silver medallist and Team USA hopeful for the Tokyo Games in 2021 has an understanding of swimming that few can match. Josh Prenot... completed his studies at University of California, Berkeley, while training for a pro career which hit a peak in 2016. With Olympic qualification now back in his sights, the American shares how physics helps him swim faster, why he failed to make the U.S. squad for the 2017 worlds, and how he's preparing to swim against the "best of the best" to get on the plane to Japan.