High Quality Content by WIKIPEDIA articles! The 4th IAAF World Indoor Championships in Athletics were held at the Skydome in Toronto, Canada from March 12 to March 14, 1993. It was the last Indoor Championships to feature the 5,000 and 3,000 metres race walk events. In addition, it was the first Indoor Championships to include heptathlon and pentathlon, albeit as non-championship events. There were a total number of 537 athletes participated from 93 countries.