Nanjing 2014 - Gold medalist Nicolangelo di Fabio (M) of Italy, silver medalist Kyle Stolk (L) of Netherlands and bronze medalist Damian Wierling of Germany pose on the podium during the awarding ceremony of Men's 200m Freestyle of Nanjing 2014 Youth Olympic Games in Nanjing, capital of Jiangsu Province, on August 18, 2014.

Yang Sun of People's Republic of China celebrates winning gold in the Men's 200m Freestyle Final on Day 3 of the Rio 2016 Olympic Games at the Olympic Aquatics Stadium on August 8, 2016 in Rio de Janeiro, Brazil.

Yang Sun of People's Republic of China (R) competes in the Men's 200m Freestyle Final on Day 3 of the Rio 2016 Olympic Games at the Olympic Aquatics Stadium on August 8, 2016 in Rio de Janeiro, Brazil.

(L-R) Conor Dwyer of the United States, Yang Sun of People's Republic of China and Kosuke Hagino of Japan compete in the Men's 200m Freestyle Final on Day 3 of the Rio 2016 Olympic Games at the Olympic Aquatics Stadium on August 8, 2016 in Rio de Janeiro, Brazil.

Nanjing 2014 - Gold medalist Shen Duo (C) of People's Republic of China, silver medalist Qiu Yuhan (L)of People's Republic of China and bronze medalist Brianna Throssell of Australia on the podium during the awarding ceremony of Women's 200m freestyle of Nanjing 2014 Youth Olympic Games in Nanjing, capital of Jiangsu Province, on August 20, 2014. 

Silver medalists Leah Neale, Emma McKeon, Bronte Barratt and Tamsin Cook of Australia, Gold medalists Allison Schmitt, Leah Smith, Maya Dirado and Katie Ledecky of the United States and Bronze medalists Katerine Savard, Taylor Ruck, Brittany MacLean and Penny Oleksiak of Canada pose on the podium during the medal ceremony for the Women's 4 x 200m Freestyle Relay Final on Day 5 of the Rio 2016 Olympic Games at the Olympic Aquatics Stadium on August 10, 2016 in Rio de Janeiro, Brazil.

Katie Ledecky of the United States competes in the Women's 4 x 200m Freestyle Relay Final on Day 5 of the Rio 2016 Olympic Games at the Olympic Aquatics Stadium on August 10, 2016 in Rio de Janeiro, Brazil.

Allison Schmitt of the United States competes in the Women's 4 x 200m Freestyle Relay Final on Day 5 of the Rio 2016 Olympic Games at the Olympic Aquatics Stadium on August 10, 2016 in Rio de Janeiro, Brazil.

Tamsin Cook of Australia competes in the Women's 4 x 200m Freestyle Relay Final on Day 5 of the Rio 2016 Olympic Games at the Olympic Aquatics Stadium on August 10, 2016 in Rio de Janeiro, Brazil.

Allison Schmitt of the United States competes in the Women's 4 x 200m Freestyle Relay Final on Day 5 of the Rio 2016 Olympic Games at the Olympic Aquatics Stadium on August 10, 2016 in Rio de Janeiro, Brazil.