Gerelt-Od Kherlen, 12, could not contain his excitement after winning a bronze medal in the children’s national boxing championship in Mongolia.

In September, his father heard about the opening of the Mongolian Boxing Academy close to their home in Dambadarjaa, a tent-dotted district on the outskirts of the capital, Ulaanbaatar. The boy had been restless.

“We are happy that our son has found his passion and hobby,” said his mother, Narantsetseg Narantsogt. He had been playing chess at school, but the programme was discontinued, she said.

They decided to send him to the new boxing school “because it will keep him away from playing on the smartphone and watching too much TV at home”.

Mongolia is the land of 13th century conqueror Genghis Khan, who built one of the largest empires in the world, and contact sports are part of a warrior tradition.

Mongolians have won Olympic medals in boxing and other individual sports such as wrestling and archery.

Gerelt-Od was already strong. Growing up in a district without running water, he fetched water every day for his family. He also chopped firewood, which he said helped him develop patience and resilience.

The boxing academy taught him and dozens of other children how to punch and avoid being hit. Gerelt-Od trained for more than two hours every day before going to school.

Less than a year later, he was among more than 400 boxers between the ages of 10 and 14 in the national championship. His third-place finish in the 10- to 12-year old, 32kg (70lb) weight category surprised his family.