Miroslav Vraštil (Czech pronunciation: [ˈmɪroslav ˈvraʃcɪl]; born 31 July 1951) is a retired Czechoslovakian rower and triple Olympian.

In 2010, Vraštil senior set the world record for finishing the most Ironman Triathlon races within one year – 22.

[4] In the 1972 Summer Olympics in Munich, Germany, he competed in the men's eight with the team coming tenth.

[1] At the 1973 European Rowing Championships in Moscow, he won a silver medal in the men's eight competition.

[10] In the following year, he competed with the men's four at the 1983 World Rowing Championships in Duisburg, Germany, where the team came fifth.

He became more competitive in the event and in 2010, he embarked on the attempt to beat the world record of finishing more than 20 Ironman Triathlon races within one year.