Ninja wannabe?

The Twin Cities has been invaded by ninja gyms. These “playgrounds on steroids” feature indoor obstacle courses inspired by the TV show “American Ninja Warrior.” At Obstacle Academy, there are programs for kids and adults, including an open gym for ninjas ages 15 and up on Friday and Saturday nights for $18. An adult membership costs $49 a month and includes obstacle-course race training and high-intensity circuit training sessions.