The hurdles in the 400m race are 36 inches high. The hurdles in the 110m race are 42 inches high.
There is no "low hurdles" event. Men's intermediate 400m hurdles is 36 inches. Women's intermediate 400m hurdles is 30 inches. Women's high hurdles is 36 inches
Strictly speaking there are no hurdles in a 400m race, but in a 400mH race there are ten hurdles per lane.
The bronze medal in the Men's 400m Hurdles event at the Rio 2016 Olympics went to Yasmani Copello.
Denmark won the silver medal in the Women's 400m Hurdles event at the Rio 2016 Olympics.
The gold medal in the Men's 400m Hurdles event at the Rio 2016 Olympics went to Kerron Clement.
Boniface Mucheru Tumuti was the silver medalist in the Men's 400m Hurdles event at the Rio 2016 Olympics.
The United States won the gold medal in the Men's 400m Hurdles event at the Rio 2016 Olympics.
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.
The country winning the bronze medal in the Men's 400m Hurdles event at the Rio 2016 Olympics was Turkey.
Men: Angelo Taylor (USA) Women; Melanie Walker (JAM)