[1] Having won medals internationally in combined events, sprints, hurdles and relays, she is widely regarded as the most versatile athlete in Southeast Asia.

Her attempt to retain her titles failed as she did not start the 400 m final, but she won silver in the 400 m hurdles behind Malaysia's Noraseela Mohd Khalid and anchored the Thai women's 4×400 metres relay team to the bronze medal.

[10] Making her fourth straight appearance at the regional event, Winatho took a clear victory in the 400 m hurdles at the 2005 Southeast Asian Games in November.

[14] Winatho produced a pentathlon best and national record of 4184 points at the 2008 Asian Indoor Athletics Championships, but she was pushed into second place in the final 800 metres event, ending up with the silver behind Irina Naumenko.

[17] She also came close to a triple defence at the 2009 Southeast Asian Games, taking the heptathlon and relay titles, but she was outrun by her Malaysian rival Mohd Khalid in the hurdles.

However, an attempt to add another gold in 400 meter hurdles was prevented by the event specialist Noraseela Mohd Khalid of Malaysia.

[22] Winatho returned to winning ways at the 2017 SEA Games in Kuala Lumpur, by claiming a bronze medal in the heptathlon, before retiring.