400 metres
An Olympic double of 200 metres and 400 m was first achieved by Valerie Brisco-Hooks in 1984 , and later by Marie-José Pérec of France and Michael Johnson from the United States on the same evening in 1996 . Alberto Juantorena of Cuba at the 1976 Summer Olympics became the first and so far the only athlete to win both the 400 m and 800 m Olympic titles . 
<triplet> Alberto Juantorena <subj> 1976 Summer Olympics <obj> participant in