USA's Katie Ledecky competes in a Women's 200m Freestyle heat during the swimming event at the Rio 2016 Olympic Games at the Olympic Aquatics Stadium in Rio de Janeiro on August 8, 2016. / AFP / CHRISTOPHE SIMON (Photo credit should read CHRISTOPHE SIMON/AFP/Getty Images)
Kathleen Ledecky from the United States of America celebrates with her teammate during the swimming final of women's 400m freestyle at the 2016 Rio Olympic Games in Rio de Janeiro, Brazil, on Aug. 7, 2016. Kathleen Ledecky won the gold medal and smashed the world record with 3 minutes 56.46 seconds./ CHINA OUT
RIO DE JANEIRO, BRAZIL - AUGUST 07: Gold medalist Katie Ledecky of the United States poses during the medal ceremony for the Women's 400m Freestyle Final on Day 2 of the Rio 2016 Olympic Games at the Olympic Aquatics Stadium on August 7, 2016 in Rio de Janeiro, Brazil. (Photo by Julian Finney/Getty Images)
RIO DE JANEIRO, BRAZIL - AUGUST 07: (L-R) Silver medalist Jazz Carlin of Great Britain, gold medalist Katie Ledecky of the United States and bronze medalist Leah Smith of the United States pose on the podium during the medal ceremony for the Women's 400m Freestyle Final on Day 2 of the Rio 2016 Olympic Games at the Olympic Aquatics Stadium on August 7, 2016 in Rio de Janeiro, Brazil. (Photo by Clive Rose/Getty Images)
