The legendary PT Usha is set to become the first woman president of Indian Olympic Association (IOA) as she emerged as the lone candidate for the top post for the December 10 elections. The 58-year-old Usha, a multiple Asian Games gold medallists and a fourth-place finisher in the 1984 Olympics 400m hurdles final, filed her nomination papers for the top job on Sunday, along with 14 others from her team for the various posts.