Active ExpertJoe Decker is an ultra-endurance power athlete and renowned fitness trainer who has helped thousands of people get into shape. He has completed many of the world's toughest endurance events, including the Badwater 135, and the Grand Slam of UltraRunning. In 2000, Joe broke the Guinness World Records? Twenty-four-hour Physical Fitness Challenge to help inspire and motivate people to get fit. He is recognized as "The World's Fittest Man." Visit his website at gutcheckfitness.com.