Yuthana Thonglek has on five occations between 1991 and 1995 been a member of Thailand's national team in 4x400 m on internation championships, including the Olympic Games 1992. His team won silver at the Asian Championship 1991 and the Asian Games 1994. His only individual start was in the 800 m at the Asian Championship in 1991, where he failed to qualify from his heat.
Personal Best: 400 – 46.68 (1993).
|1992 Summer||25||Barcelona||Athletics||Men's 4 × 400 metres Relay||Thailand||THA||6 h1 r1/2|