Sandy Zimmerman, 42, pumped up fans with an unexpected performance.
After being bullied, she turned her haters into motivators.
Can you have the same level of honesty about your fitness level? It takes time and specific effort to prepare for these types of obstacle course runs. If you did not prepare, bad outcomes are predictable.
Best of all for the aspiring, deeply masochistic contestants, racers have no knowledge of what the obstacle course might
Will Dean, founder and CEO of hardcore obstacle course Tough Mudder, joins HuffPost Live to discuss entrepreneurship, athletics and much more.