Emerson Esnal Hernández was born in
San Salvador,
El Salvador on 29 January 1989, one of seven children of Juana Dolores Hernández. Hernández became involved with the sport of race walking when a group from the National Sports Institute of El Salvador visited his school looking for recruits. The team recruited Hernández's best friend Rafael Avalos, and Hernández accompanied him because Rafael was shy. They were taken to a stadium, where Hernández was noticed by a coach and entered training in athletics. At age 13 Hernández began to train with coach Rafael Cerna, and only five months after beginning training Hernández won first place in a cross country race. By 2003 he had qualified for the World Junior Championships and in 2005 won a gold medal in the El Salvador National Championships. During the early years of his athletic career, he continued his academic studies and in 2008 he graduated with a B.A. in psychology from the
Instituto Nacional Alberto Masferrer de la Zacamil. He qualified for the 2010 Central American Games in
Puerto Rico, but withdrew due to injury, and in the same year finished 24th in the 50 km race walk at the World Cup in
Chihuahua, Mexico. As of 2012, he was ranked 54th in the world in the 50 km runwalk. Hernández qualified to represent El Salvador in the
2012 Olympic Games in
London in the 50 km race walk, and traveled to Italy prior to the games for training. There, he has been coached by experienced Italian race walking coach Sandro Damilano, who has trained a number of Chinese and Italian athletes for the Olympics. At the 2012 Olympics, he finished in 26th place with a new personal best time of 3:53:57. ==Personal bests==