Dave Hemery in the time of 48.12 seconds, at the time a world record.
The United States won the gold medal in the Men's 400m Hurdles event at the Rio 2016 Olympics.
The country that won the gold medal in the Women's 400m Hurdles event at the Rio 2016 Olympics was the United States.
The gold medal in the Men's 400m Hurdles event at the Rio 2016 Olympics went to Kerron Clement.
Natalya Antyukh
The winners in the Men's 400m Hurdles event at the Rio 2016 Olympics were Kerron Clement, Boniface Mucheru Tumuti, and Yasmani Copello. Clement won the gold medal, Tumuti won the silver medal, and Copello won the bronze medal.
Denmark won the silver medal in the Women's 400m Hurdles event at the Rio 2016 Olympics.
In the most recent Olympics (2012), Sun Yang of China won the gold in the 400m freestyle.
The bronze medal in the Men's 400m Hurdles event at the Rio 2016 Olympics went to Yasmani Copello.
Boniface Mucheru Tumuti was the silver medalist in the Men's 400m Hurdles event at the Rio 2016 Olympics.
Christine Ohurogu
Kenya took home the silver medal in the Men's 400m Hurdles event at the Rio 2016 Olympics.
The winner of the silver medal in the Women's 400m Hurdles event at the Rio 2016 Olympics was Sara Slott Petersen.