Extreme Endurance Challenges (Updog Books: Extreme Sports Guides)

Some competitors are able to crawl under barbed wire for miles. Others stay awake for days at a time. Readers will learn about some of the world's most extreme, endurance competitions and how, athletes train for them. "Endurance challenges take focus, strength, and most importantly, lots of training. Readers will learn about extreme challenges and what it takes to win"-- Provided by publisher