Learning parkour (free running) seems to be the key for most of the contestants. Weight training may also be helpful. Develop upper body and grip strength and endurance.
Those who have been most successful have also built the obstacles and trained on them.
American Ninja Warrior - 2009 was released on: USA: 12 December 2009 (TV premiere)
American Ninja Warrior - 2009 - 4.18 was released on: USA: 25 June 2012
American Ninja Warrior - 2009 - 4.17 was released on: USA: 24 June 2012
yes
American Ninja Warrior - 2009 4-17 was released on: USA: 24 June 2012
American Ninja Warrior - 2009 4-18 was released on: USA: 25 June 2012
yes American ninja warrior does have Japanese contestants
American Ninja Warrior - 2009 Northwest Regional Finals was released on: USA: June 2012
American Ninja Warrior - 2009 Northeast Regional Finals was released on: USA: June 2012
You need to
David campbell
American Ninja Warrior - 2009 2013-03-02 was released on: USA: 2 March 2013