Rio de Janeiro - Amnat Ruenroeng has vowed to win a medal for his family and country at next month's Olympics.

"My physical condition has gradually improved,'' said the former IBF flyweight champion who will fight in the lightweight division in Rio.

"The weather here is fine. I will try to win a medal for the nation and my family."

While he admitted that he misses his family back home, he does not feel homesick because he is able to talks to them regularly through his smartphone.

"I miss my wife and kid but I don't feel lonely because I talk to them every day," said Amnat.

"My son World told me to bring back a medal. My wife Rat told me to give my all."

It will be the 36-year-old's second Olympic appearance after his quarter-final defeat at the 2008 Games.

After losing to Mongolia's Purevdorjiin Serdamba in Beijing, Amnat and the Thai camp complained he was robbed of victory.

Amnat, who successfully defended the IBF flyweight title against China's Zou Shiming last year, lost the belt to Johnriel Casimero of the Philippines a few months ago.

He planned to move up to super-flyweight but was persuaded to make a comeback to the national side after the International Boxing Association (Aiba) decided to allow professional fighters to take part in the Olympics.

Amnat earned a ticket to Rio at a qualifying event earlier this month.

Five Thai boxers will take part in the Rio Games with the other four being Chatchai Butdee (56kg), Wuttichai Masuk (64kg), Sailom Ardee (69kg) and Peamwilai Laopeam (women's 51kg).