Think racecar driving isn't a real sport? Jimmie Johnson disagrees. While the NASCAR champ shot his Men's Fitness cover, we were able to pull him aside for a few minutes to find out what makes racecar driving an endurance sport. But it turns out Jimmie's athletic pursuits don't stop there; last July he competed in his first triathlon. In this exclusive interview, Jimmie shares what, for him, was the hardest part of the training process. Click the video above to tune in.
To find out more about why the racecar driver is considered one of the most influential athletes, get your hands on the May issue of Men's Fitness, on newsstands April 22nd.