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Tomorrow morning bikers will take off from the heavenly hills of Utah en route to Sin City, in the fourth annual Saints to Sinners Bike Race to raise awareness and money for the fight against ALS.

Steve Prefontaine is arguably the most famous distance runner the world has ever known. ATLX breaks down five things that made Pre such a unique and charismatic athlete on and off the track.

Brent Steffensen and Kacy Catanzaro recently dominated the most technically challenging obstacle race out there. How did they do it and what's their advice for you? Check it out in our latest ATLX one-on-one.

The ACL tear is one of the most dreaded injuries an athlete can face, and it can happen to anyone.

It's hard to believe that Triathlons are only around 40 years old in the United States. Read more to find out the history of triathlons and one of the craziest Ironman attempts to date.

Alex Hollanshead epitomizes the weekend warrior. After running his first marathon because of a bet, he has since completed 11 more, has taken up cycling and is training for his first Ironman. A product engineer in Houston, TX, see what motivates him to be an everyday athlete.

Rich Roll finished five Ironman challenges on five different islands of Hawaii in one week. Two years before that, he dominated the Ultraman. And 10 years before that, he was totaled, tanked and in trouble.