Conversation so far:
Who are the announcers on American Ninja Warrior
Iseman and Gbaja-Biamila returned to host the eleventh season along with new sideline reporter Zuri Hall.
What is the genre of the American Ninja Warrior show
The genre of American Ninja Worrior is sports enterteinment, and sports competition.
How many seasons of American Ninja Worrior have been filmed so far
On January 22, 2020, the series American Ninja Worrior was renewed for a twelfth season to air in summer 2020.
When was the first season of American Ninja Worrior aired
The series premiered on December 12, 2009, on the now-defunct cable channel G4, and airs now on NBC with encore episodes showing on  NBCSN.

Question: How many competed in the first season
Self-contained rewrite: How many athletes competed in the first season of American Ninja Worrior.