According to reports, actor and model Milind Soman successfully completed the 517.5-km-long Ultraman Florida challenge. Considered to be one of the world's toughest endurance races, the challenge requires participants to complete a 10-kilometre open water swim, a 423-kilometre-long bike ride and an 84-kilometre ultra-marathon run. The 51-year-old is the only participant to compete barefoot.