An inside look at the subculture of athletes who have devoted their lives to ‘American Ninja Warrior’

Ninja Warrior
Stuntwoman and contestant Jessie Graff works out on a homemade obstacle course while practicing in Scotts Valley, Calif. for the finals of “American Ninja Warrior.”
(Gina Ferazzi / Los Angeles Times)

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David Wharton is a feature sportswriter for the Los Angeles Times.