| From Wendy Bumgardner, your About Fitness Editor | | Train for a Marathon | Triathlon Training | Obstacle and Extreme Races vs. Mud Runs What have you gotten yourself into? You thought you'd be splashing through some mud puddles, but now your superhero costume cape is caught on the barbed wire and you don't need that timing chip on your shoe to tell you that you aren't going to win this thing. Here's the breakdown on obstacle and extreme races. | Train for a Century Ride A century ride is 100 miles. In one day. Yep, you are going to need some training to do that. Here's how. | | | | Related Searches | | | | Featured Articles | | | | | | Sign up for more free newsletters on your favorite topics | | | | You are receiving this newsletter because you subscribed to the About.com Fitness newsletter. If you wish to change your email address or unsubscribe, please click here. If you would like to unsubscribe from all newsletters sent from About.com, please send an email to optout@about.com with "Unsubscribe" as the subject line. About.com respects your privacy: Our Privacy Policy Contact Information: 1500 Broadway, 6th Floor New York, NY, 10036 © 2014 About.com | | | | Fitness | | Advertisement | |