I can train for half marathons on pavement and on trails, but as soon as I change it up to gravel or loose dirt my knee swells and the pain it causes is unreal. Any ideas why this happens?

Strategies for getting used to running off the bike when starting triathlon or taking on a new distance.

From interval training to chocolate milk, here is the latest from cutting edge research labs

World-record swimmer gives advice on correct breathing technique

How triathlon and professional racing helped Kyle grow up -- within the fantasy world of being a pro

Dave Scott, six-time Hawaii Ironman world champion, shares his insights and plenty of stories to help you define your own success.

"Fandom" in triathlon compared to other sports. If you're a sports fan and simply love to follow sport, why pick a sport that may offer a view of the start, the finish and a few moments in between?

Second in a series of three articles about the basics, the niceties and the luxuries

After two stress fractures, does new pain mean bad news?

A middle-of-the-pack triathlete takes on the iron distance for the first time at Rev3's inaugural full distance race

At 66 years old, I completed my first sprint triathlon!

Feeling confident and cocky, after finally losing some weight, I got off my back side and into triathlon.

Lake Havasu Tri 3/19/2011

In part three, the coach answers questions on power meter workouts, threshold calculations and how strength training affects power.

This panel discussion will cover many questions on heart rate monitors, powermeters and testing.