These challenges aren't just for fun. They will force you to dig deep and create lasting change.

It turns out the problem with training in heat isn’t dehydration, but something else entirely. This is very different from what we've been told.

Seeing yourself get faster, fitter, and leaner by doing shorter, higher-intensity runs might be just what you need.

Considering trying your first ultra? Here's what to expect and how to adjust your training for success.

What's up with female endurance athletes getting "skinny fat"? I couldn’t find a single case of a man getting ready for an Ironman who gained weight.

How can you expect to perform your best on race day if you don’t practice everything - your nutrition, your equipment set up, and everything else?

It's a common misconception that a higher cadence requires more energy, but in reality the opposite is true - a higher cadence is more efficient due to the muscle-shortening reflex.

This week I'm finishing up my taper week for the LA marathon. I've never done a short taper like this before, so I'm curious to see what the results will be on Sunday.

Weight training is essential for increasing running ability and decreasing chance of injury. I know from experience that it is possible to strength train without bulking. Here's what I recommend.

If you've gotten into endurance sports you've probably gotten good at enduring pain for long periods of time. But are you actually getting faster? Here is my advice for improving your times.

I took some time off of training due to injury and life changes, but now that I'm settled I have my eye on my next challenge - the 2013 Great Wall of China Marathon!

A recent study showed that ultramarathon runners lost 6% of the gray matter in their brains by the time they completed their race. Are endurance sports bad for your brain health?

I had a chance to speak to Kellie about running epicman and ultras, her ambassadorship at GoTribal, her best marathon advice, and exactly why she does these crazy events.

Looking back I wish I had someone to tell me how to become a better runner before my first half marathon. So, I put together a list of 5 things that will help you get started successfully.