What does it take to be the toughest "Mudder" in the world? Three-time champion Ryan Atkins shares his regimen for preparing for the most grueling obstacle races and the motivations that keep him at the top of his game.

Las Vegas' own BDG dentists participated in this year's "Tough Mudder" challenge.

Baltimore Fit Body Bootcamp puts together a team to compete in the Tough Mudder 2013. With a training plan designed and willing participants, Fit Body hopes to raise a lot of money and bring people together while getting fit.